8.6 Common Trap Answers

Wrong Answers Break The Rule In Predictable Ways

Deductive wrong answers are not random; they follow a small set of patterns. Once you can name each trap, you eliminate choices calmly instead of agonizing over every option. The six families below cover the large majority of CJBAT distractors.

The Six Trap Families

Worked Example: Spotting Each Trap

Rule: A K-9 unit is deployed only if a supervisor authorizes it and a trained handler is on scene. Facts: A supervisor authorized a K-9 deployment. The prompt does not say whether a trained handler is on scene. A K-9 was later deployed.

Now read four tempting-but-wrong conclusions and name the trap:

• "A trained handler must have been on scene, since the supervisor authorized it." — Ignored condition / scope creep: authorization is only one of two required conditions; it says nothing about the handler.
• "Because a K-9 was deployed, a supervisor must have authorized it." — Reversal: this affirms the consequent; the deployment does not prove the authorization (here it happens to be true, but the reasoning is invalid and a different fact set would break it).
• "The K-9 will track the suspect successfully." — Added fact / overstatement: nothing in the rule promises a successful track.
• "All future deployments are now pre-authorized." — Overstatement: one authorization does not generalize to all deployments.

The rule actually controls only whether deployment is authorized, and that requires both conditions. With the handler condition unstated, the supported conclusion is narrow: deployment is authorized only if a trained handler is also on scene — and the prompt does not confirm that, so any answer asserting a valid deployment overreaches.

A Calm Elimination Routine

The most effective approach is to eliminate by trap name, then confirm the survivor:

• Cross out any choice that reverses the rule's direction.
• Cross out any choice that adds a fact not in the prompt.
• Cross out any choice that ignores a required condition.
• Cross out any choice that applies the rule to the wrong category.
• Cross out any choice that overstates the result with 'always/all/guarantees'.
• Cross out any choice that answers something the rule never addressed.

Then apply the final test to whatever remains: must this be true if the rule and facts are true? Familiarity is not enough — a choice can echo half the rule and still carry a trap. Necessity is the standard. If exactly one choice survives elimination and passes the necessity test, that is your answer. If two seem to survive, you have missed a trap in one of them; reread the conditions until the weaker choice falls. This disciplined elimination, repeated across the Section III items, is what converts careful reading into a passing deductive-reasoning score.

Two More Traps, And A Final Worked Drill

Beyond the six core families, two subtler traps catch careful readers. The first is the extreme-word trap: a choice that is almost right but overstated by a single absolute word — always, never, all, none, guaranteed. " Scan each option for absolutes and confirm the rule actually licenses that strength. The second is the true-but-irrelevant trap: a choice that states something genuinely true (often lifted from the prompt) but that does not answer the question asked. A statement can be perfectly accurate and still be the wrong answer because it is not the conclusion the item requests.

Work one final drill that combines several traps.

Rule: A recruit advances to firearms training only if the recruit has (a) passed the written exam and (b) completed the medical clearance. Fact: Recruit Vance passed the written exam. The prompt does not mention Vance's medical clearance.

Evaluate four choices:

• "Vance advances to firearms training." — Ignored condition: only one of two required conditions is confirmed.
• "Vance always advances after passing the written exam." — Extreme word + ignored condition: 'always' overstates and the second condition is unmet/unknown.
• "Vance passed the written exam." — True-but-irrelevant: accurate, but it restates a fact instead of giving the conclusion about advancement.
• "Whether Vance advances cannot be determined from the information given." — Supported: because the medical-clearance condition is unstated, advancement is not forced, so the certain conclusion is that it cannot be determined.

The correct answer is that advancement cannot be determined — the honest deductive result when a required condition is left open. Beginners avoid "cannot be determined" because it feels like a non-answer; in fact it is frequently the precisely correct deduction when the prompt withholds a needed fact.

Close every item the same way: eliminate by trap name, then confirm the survivor is required by the rule and facts. Necessity is the only standard that never misleads — not familiarity, not detail, not how official the scenario sounds. Carry that standard through all of Section III and the deductive items become a dependable source of points.