ECR04 — Sentence Relations
📚 ECR04 · Sentence Relations · CDS Reading LevelCDS Level
📌 What Sentence Relations Tests: Two statements (Statement 1 and Statement 2) are given. You must identify the logical relationship between them. Does Statement 2 confirm, contradict, support, be implied by, or be independent of Statement 1? The options describe the relationship — only one is correct.
A second format gives a passage/statement and asks you to identify which of the four options is an assumption, conclusion, inference, or strengthening/weakening statement for the given passage.
💡 Why This Is Tested: Sentence Relations tests logical reasoning through language — a core skill for officers. Military decision-making requires knowing whether new information confirms, contradicts, or merely elaborates on existing intelligence. The exam tests whether you can identify these relationships precisely.
C1 The Six Relationship Types — Defined and Illustrated
✓ Type 1: CONFIRMS / SUPPORTS
- Statement 2 provides evidence or reason that makes Statement 1 more believable or true
- Statement 2 is consistent with Statement 1 and adds to it
- S1: Regular physical training improves combat readiness.
- S2: Soldiers who exercise daily show higher endurance scores.
- ✓ S2 provides evidence confirming S1.
✗ Type 2: CONTRADICTS / DISPROVES
- Statement 2 provides evidence or an argument that makes Statement 1 false or less credible
- The two statements cannot both be true at the same time
- S1: All officers attended the debriefing session.
- S2: Two senior officers were deployed and could not attend.
- ✗ S2 directly contradicts S1 (‘all’ is disproved).
↔ Type 3: INDEPENDENT (No Relation)
- Statement 2 discusses a different topic or aspect; neither confirms nor contradicts S1
- Both may be true or false without affecting each other
- S1: The regiment was awarded the President’s Colours.
- S2: The army is planning to introduce new combat rations.
- ↔ No logical connection between these statements.
⇒ Type 4: S1 IMPLIES / ENTAILS S2
- If Statement 1 is true, Statement 2 must also be true as a logical consequence
- S2 follows necessarily from S1; you cannot accept S1 and deny S2
- S1: No officer passed the medical examination.
- S2: Some officers failed the medical examination.
- ⇒ If no one passed, at least some must have failed → S1 implies S2.
🔄 Type 5: S1 IS ASSUMED IN S2 (Assumption)
- An assumption is an unstated premise that must be true for Statement 2 to be valid
- The assumption is not directly stated but is “taken for granted” in S2
- S2: “The new training method will improve marksmanship.”
- Assumption: soldiers are currently not achieving optimal marksmanship (otherwise improvement is irrelevant)
- An assumption fills the gap between what is said and what is concluded.
🔎 Type 6: S2 IS AN INFERENCE FROM S1
- An inference is a reasonable conclusion that can be drawn from S1, though not explicitly stated
- It goes beyond what S1 says, but is supported by it
- S1: The unit has not been deployed in three years.
- Inference: the unit may lack recent combat experience
- An inference is probable, not certain. It may or may not follow.
C2 Confirms vs Implies vs Infers — The Three Most Confused Types
The distinction that most students miss:
Confirms/Supports: S2 provides EVIDENCE or REASON that makes S1 more true. S2 is an external fact supporting S1.
Implies (S1 → S2): S2 MUST be true IF S1 is true. It is a logical necessity, not just support. You cannot deny S2 while accepting S1.
Inference: S2 is a PROBABLE conclusion drawn FROM S1. It goes beyond S1 and may or may not follow. It is possible, not certain.
✓ Confirms (External Evidence)
- S2 is a separate fact that backs S1
- S2 was true independently
- S2 adds weight to S1 from outside
- S1: Discipline improves performance.
- S2: Studies show disciplined units win more often.
- → S2 is an independent finding that supports S1
⇒ Implies (Logical Necessity)
- S2 follows necessarily from S1
- Cannot accept S1 and deny S2
- S2 is logically contained in S1
- S1: All officers cleared the test.
- S2: No officer failed the test.
- → If ALL cleared, then NONE failed (logical necessity)
🔎 Inference (Probable Conclusion)
- S2 is a reasonable but not certain deduction
- S1 supports S2 but does not guarantee it
- S2 goes beyond what S1 literally says
- S1: The candidate trained for two years.
- S2: He is well-prepared for the selection.
- → Probable conclusion, but not certain (he may still fail)
C3 The Decision Tree — How to Identify the Relationship
Use These Questions in Order
Step 1: Read both statements carefully. Understand the factual content of each.
Step 2: Ask: Can both be true at the same time?
• If NO → they Contradict each other.
• If YES → proceed to Step 3.
Step 3: Ask: Do they share the same topic?
• If NO → they are Independent (no relation).
• If YES → proceed to Step 4.
Step 4: Ask: If S1 is true, does S2 NECESSARILY follow (cannot deny it)?
• If YES → S1 Implies S2 (logical entailment).
• If NO → proceed to Step 5.
Step 5: Ask: Does S2 provide evidence or reason that makes S1 more believable?
• If YES → S2 Confirms/Supports S1.
• If NO → Ask: Is S2 a reasonable conclusion you can draw FROM S1? → Inference.
C4 Worked Examples — Full Relationship Analysis
Worked Example 1
Statement 1: An officer who does not lead from the front cannot inspire genuine loyalty in his troops.
Statement 2: Officers who led their units personally in combat were decorated for the highest instances of troop loyalty recorded during the conflict.
Analysis:
Step 2: Can both be true? Yes — if those who lead from front get loyalty, and those who do not fail to get it, both statements are consistent.
Step 3: Same topic? Yes — both are about officer leadership and troop loyalty.
Step 4: Does S1 necessarily imply S2? Not exactly — S1 makes a negative claim; S2 provides positive evidence.
Step 5: Does S2 provide evidence making S1 more believable? Yes — S2 shows that officers who DID lead from the front earned loyalty, which supports S1’s claim that those who don’t cannot earn it.
Relationship: S2 CONFIRMS / SUPPORTS S1 ✓
Worked Example 2 — Contradiction
Statement 1: The entire unit was present at the briefing session held at 0600 hours.
Statement 2: Three soldiers from the unit were guarding the perimeter and were not called for the briefing.
Analysis:
Step 2: Can both be true at the same time? NO — if the ‘entire unit’ was at the briefing, then NO soldier from the unit was elsewhere. S2 says three were at the perimeter (not at the briefing). This directly disproves ‘entire unit was present’.
Relationship: S2 CONTRADICTS S1 ✗
Worked Example 3 — Implication vs Inference
Statement 1: None of the cadets from Platoon A failed the final assessment.
Statement 2: All cadets from Platoon A cleared the final assessment.
Analysis:
Step 4: If ‘None failed’ (S1) is true, does ‘All cleared’ (S2) necessarily follow?
YES — if NO cadet failed (= NOT failed = cleared), then ALL cadets cleared. You cannot accept ‘none failed’ and deny ‘all cleared’ without contradiction. This is logical necessity.
Relationship: S1 IMPLIES S2 (logical entailment) ⇒
Worked Example 4 — Independence
Statement 1: The Border Roads Organisation has completed a new highway connecting two forward bases.
Statement 2: The Army’s annual sports meet was held in Pune this year.
Analysis:
Step 2: Can both be true? Yes.
Step 3: Same topic? No — one is about infrastructure; one is about sports. They share a general military context but have no logical connection.
Relationship: INDEPENDENT (No logical relation) ↔
Q1. Read the two statements and identify their relationship:
Statement 1: All personnel who completed the advanced leadership course received a certificate of merit.
Statement 2: Major Sharma received a certificate of merit.
- (a) S2 contradicts S1
- (b) S2 confirms S1
- (c) S1 implies S2 but S2 does not imply S1
- (d) S1 and S2 are independent
Answer: (c) S1 implies S2 but S2 does not imply S1
(a) Wrong: both can be true simultaneously — there is no contradiction. (b) Wrong: S2 is not providing EVIDENCE for S1; it is a specific case. (d) Wrong: they are on the same topic. (c) Correct: If S1 is true (all who completed received certificates), and if Major Sharma completed the course, then he must have received one → S1 implies this result. However, S2 being true (he received the certificate) does not imply S1, because he may have received it for other reasons. The implication is one-directional.
Q2. Read the two statements and identify their relationship:
Statement 1: The commanding officer stated that no soldier in the regiment had ever been court-martialled.
Statement 2: Records show that two soldiers from the same regiment faced court martial proceedings five years ago.
- (a) S2 confirms S1
- (b) S2 is independent of S1
- (c) S2 is an inference from S1
- (d) S2 directly contradicts S1
Answer: (d) S2 directly contradicts S1
(a) Wrong: S2 does not support S1; it opposes it. (b) Wrong: both statements are about the same subject (court martial records in the regiment) and cannot both be true. (c) Wrong: an inference is a probable conclusion drawn from S1; S2 is a counter-factual claim. (d) Correct: The CO claimed ‘no soldier EVER’ was court-martialled; S2 provides direct evidence that two soldiers WERE. These statements cannot both be true → direct contradiction.
Q3. Read the two statements and identify their relationship:
Statement 1: Physical fitness is a prerequisite for successful high-altitude operations.
Statement 2: Troops that underwent dedicated high-altitude acclimatisation training showed significantly lower casualty rates in mountain operations.
- (a) S2 contradicts S1
- (b) S2 is an assumption behind S1
- (c) S2 supports and confirms S1
- (d) S1 and S2 are independent
Answer: (c) S2 supports and confirms S1
(a) Wrong: S2 does not oppose S1; acclimatisation training contributes to fitness. (b) Wrong: an assumption is an unstated premise; S2 is an explicit, stated finding. (d) Wrong: both are about fitness and high-altitude operations — directly related. (c) Correct: S1 claims physical fitness matters in high-altitude ops. S2 provides empirical evidence (lower casualty rates from trained troops) that directly supports and confirms S1.
Q4. Read the two statements and identify their relationship:
Statement 1: Some officers in the battalion are combat veterans.
Statement 2: All officers in the battalion are combat veterans.
- (a) S2 contradicts S1
- (b) S1 implies S2
- (c) S2 implies S1 but S1 does not imply S2
- (d) S1 and S2 are independent
Answer: (c) S2 implies S1 but S1 does not imply S2
(a) Wrong: they can both be true if ALL officers are veterans (because SOME would then also be true). (b) Wrong: if SOME are veterans, it does not follow that ALL are → S1 does NOT imply S2. (d) Wrong: they are on the same topic. (c) Correct: If S2 (ALL are veterans) is true, then S1 (SOME are veterans) must also be true → S2 implies S1. But if S1 (SOME are veterans) is true, it does not mean ALL are → S1 does not imply S2. The implication goes from S2 to S1 only.
Q5. Read the two statements and identify their relationship:
Statement 1: The new communications equipment was issued to the regiment before the winter deployment.
Statement 2: The Army’s recruitment targets for next year were revised upwards by 15 percent.
- (a) S2 confirms S1
- (b) S2 contradicts S1
- (c) S2 is an inference from S1
- (d) S1 and S2 are completely independent
Answer: (d) S1 and S2 are completely independent
(a) Wrong: S2 (recruitment targets) provides no evidence for or against S1 (equipment issued to one regiment). (b) Wrong: both can easily be true simultaneously; there is no logical conflict. (c) Wrong: no reasonable inference about recruitment follows from the equipment statement. (d) Correct: S1 is about equipment logistics for one regiment; S2 is about national recruitment policy. They share a broad military context but have absolutely no logical relationship.
Q6. Read the two statements and identify their relationship:
Statement 1: It is impossible to maintain operational security if personnel are allowed unrestricted access to social media during deployment.
Statement 2: During the last deployment, the battalion restricted all social media access, and no operational intelligence was leaked.
- (a) S2 contradicts S1
- (b) S2 is independent of S1
- (c) S2 confirms S1 by providing supporting evidence
- (d) S1 implies S2 with logical necessity
Answer: (c) S2 confirms S1 by providing supporting evidence
(a) Wrong: S2 does not oppose S1; it presents a case where restricting access worked. (b) Wrong: S2 is directly about the same topic (social media during deployment and operational security). (d) Wrong: S1 does not guarantee what happened in S2; it makes a general claim, not a specific prediction. (c) Correct: S1 makes a general claim (unrestricted access compromises security). S2 provides a specific instance where RESTRICTION of access (the opposite of what S1 warns against) resulted in no leaks — thereby confirming S1’s warning as valid.
📋 Quick Reference — Sentence Relations
① Decision Tree
- Can both be true? NO → Contradiction
- Same topic? NO → Independent
- S1 true → S2 necessarily true? YES → S1 Implies S2
- S2 provides evidence for S1? YES → Confirms
- S2 is a probable deduction from S1? → Inference
② Confirms vs Implies
- Confirms: S2 is external evidence supporting S1
- Implies: If S1 true, S2 must be true (logical necessity)
- Implies test: Can I accept S1 and deny S2? NO → Implies
- Confirms test: S2 could be true even if S1 were false
- Implication is logical; confirmation is evidential
③ Inference vs Implication
- Inference: reasonable but NOT certain deduction from S1
- Implication: certain, logical, necessary consequence
- Inference goes BEYOND what S1 says
- Implication is contained WITHIN what S1 says
- Inference can be wrong; implication cannot (if S1 is true)
④ Contradiction Signals
- All ‘vs’ Some/None (quantifier clash)
- Always vs Never (frequency clash)
- Specific counter-example to a universal claim
- Direct factual conflict on the same subject
- Logical impossibility of both being true simultaneously
⑤ Independence Signals
- Different topics with no logical link
- Both can be true without affecting each other
- One cannot be evidence for or against the other
- Sharing a general category (military) ≠ logical relation
- Check: does S2 change the believability of S1? No → Independent
⑥ All vs Some Logic
- ALL → SOME (valid implication: all implies some)
- SOME → ALL (invalid: some does not imply all)
- NONE → NOT ALL (valid)
- NOT ALL → NONE (invalid)
- ALL + NONE about same group = Contradiction