How to Make Deductions in LSAT Logic Games Before Answering Any Question

Most Logic Games questions do not give you new information — they ask about what must, could, or cannot be true given the original rules. If you have already derived those conclusions before Question 1, each question becomes a lookup, not a fresh solving problem.

A student who spends forty-five seconds on deductions and then answers five questions in six minutes will outperform a student who skips deductions and spends ten minutes working through each question from scratch.

The deduction phase does not require solving the entire game. It requires identifying the constraints that are most loaded — the slots or entities with the most rules touching them — and seeing what follows from those constraints.

Trigger 1 — Shared entities. When two or more rules mention the same entity, combine them. If rule A says 'J must come before K' and rule B says 'K must come before L,' the chain J—K—L is a deduction neither rule contains alone.

Trigger 2 — Nearly-determined slots. If one slot is constrained by three or more rules, list what can go there. If only one entity remains possible, that entity is placed.

Trigger 3 — Fixed-size groups with limited options. If a group must contain exactly two members and four rules govern membership, enumerate the valid combinations. There are often only two or three.

Trigger 4 — Blocks and anchors. A two-entity block (AB always together) has limited legal positions in a five-slot diagram. Enumerate them and mark which slots can start the block. This anchors large portions of the diagram.

Trigger 5 — Conditional chains. Write out all the 'if A then B' rules and their contrapositives, then look for chains: A → B → C. The chain is a deduction you can apply in one step instead of two.

Record permanent deductions on your master diagram. If entity F can only go in slots 3, 4, or 5, write 'F: 3/4/5' beside the diagram. If a two-entity block can only start in slots 1, 2, or 3, note the allowed starting positions.

Do not force deductions that are not there. If after sixty seconds you have not found a dramatic simplification, move to the questions. Many games are genuinely open and only collapse when a question adds a new condition.

The best deduction sessions produce two to three insights, not ten. If you think you have ten deductions, some of them are probably wrong. Re-check your rule transcriptions.

Some games — usually heavily constrained sequencing games — have only one or two valid complete arrangements. If your deductions produce a small finite set of complete arrangements, write them all out. Every question can then be answered by checking the list.

The sign that you may be in a fully-determined game: after three or four rules, half the slots are already fixed. Follow the chain and see whether the whole game collapses.

Question-grinders attempt every question from the rules alone, re-reading the same constraints five times. Deduction-thinkers invest time upfront to shrink the problem, then move through questions quickly.

The deduction mindset transfers directly to LSAT Logical Reasoning: in both sections, the skill is finding what must follow from given information. Students who practice Logic Games deductions report that Logical Reasoning inference questions feel noticeably clearer.

Verbloom's Logic Games drills are designed around this habit: after setting up a game, you are prompted to find the key deductions before the first question is revealed. This trains the deduction phase as a distinct, repeatable skill. Try it at verbloom.dev.