Logical ReasoningDifficulty: Hard

PT154 S1 Q26 ExplanationPhilosopher: A person is morally responsible

A free, expert breakdown of this official LSAT Logical Reasoning question.

TopicsMust be True

Keep going in LSAT Lab

  • Save & drill this skill build targeted practice sets from questions like this one

  • Video walkthroughs watch every question solved step by step

  • 81 official LSATs as questions, timed sections & full-length tests

Full official LSAT questions are available through LawHub. This page provides LSAT Lab's explanation, strategy, and review tools without republishing the full official question.

Stimulus

Philosopher: A person is morally responsible for an action only if that action is performed freely. And an action is free only if there is an alternative action that is genuinely open to the person. But an alternative that alternative action is not morally wrong.

What this question is testing

Must be True

Your task

Break the argument into its conclusion and evidence, then do exactly what the question stem asks with that structure.

Common trap

Answers that sound relevant to the topic but don't connect to the argument's actual reasoning.

Winning move

Predict what a right answer must do, then test each choice against the conclusion-evidence gap.

Reading along? Open the full official question in LawHub — we show a fragment here and keep the reasoning in our own words.

The question
26.

If the philosopher’s statements are true, which one of the following must

Answer choices, explained

  1. Illegal Reversal7% picked this

    An alternative action is not genuinely open to a person unless that person would be morally responsible for

    This is our chain. Morally action alt. action alt. action responsible → freely → genuinely → action for action performed open wrong This answer says alt action morally genuinely → responsible open for action It's going backwards from our 3rd ingredient to our 1st one.

  2. Out of Scope: most actions2% picked this

    People are not morally responsible for most of the actions that

    We can never derive a claim about "most X" if the stimulus never had a claim about "most X". This answer is saying, "Most performed actions are ones that people aren't morally responsible for". To prove that we'd need to know that in most cases that actions are performed, people aren't performing it freely / don't have a morally acceptable option open to them.

  3. Illegal Reversal25% picked this

    A person is morally responsible for an action if there is an alternative action that is genuinely

    This is our chain. Morally action alt. action alt. action responsible → freely → genuinely → action for action performed open wrong This answer says alt action morally genuinely → responsible open for action "If" indicates the sufficient / left-side condition. It's going backwards from our 3rd ingredient to our 1st one. It's also identical to (A), so it's guaranteed that both are wrong.

  4. Unsupported Relationship6% picked this

    If it would be morally wrong for a person to perform a given action, then that action is

    This was our chain Morally action alt. action alt. act responsible → freely → genuinely → action for action performed open wrong This answer says morally action is wrong → genuinely action open That doesn't match anything. We only talked about whether an "alternative action is genuinely open", not about whether "an action is genuinely open".

  5. Correct59% picked this

    An action is not free unless there is an alternative action that is

    Why this is right

    This is our chain. Morally action alt. action alt. action responsible → freely → genuinely → action for action performed open wrong This answer says action alt. action freely → not morally performed wrong That's going from the 2nd to the 4th ingredient in the chain. An action is not free unless there's an alternate action that is genuinely open to the person (i.e. genuinely open = an alternative that is not morally wrong).

    Skill tested: Must be True · how this choice captures the argument's function is the move to repeat next time.

Continue the review in LSAT Lab

Save this question, watch the video walkthrough, and drill similar questions in your LSAT Lab account.

LSAT Lab

Turn this review into a targeted study plan.

Save this question, drill more like it, watch the video walkthrough, and track your progress in your LSAT Lab account.

Start practicing free