How can I tell whether a puzzle’s difficulty comes from reasoning or unclear wording?

Treat those as two separate questions: Do solvers understand what they are being asked to do, and can they work out the answer once they understand it? Watch a few people try the puzzle without immediately explaining it. Record pauses, questions, and interpretations rather than deciding from the time alone: a long pause could mean someone is reasoning carefully, rereading an instruction, or unsure what counts as a valid answer.

Use three signals. First, ask each solver to restate the goal and rules in their own words. Second, ask what they think a particular clue or phrase means. Third, ask what information they believe they still need. Different interpretations of the rules point toward wording to review; agreement about the rules followed by productive clue-linking points more toward reasoning difficulty. These are clues, not proof: a puzzle can have both issues.

Keep a compact diagnosis sheet and make brief notes during the attempt. Write down the exact instruction or clue involved, what the solver did or said, and your first interpretation of the cause. Mark interpretations as observations, not conclusions. For example, “reread ‘next to’ twice” is an observation; “doesn’t understand spatial reasoning” is an unsupported judgment.

You can offer one neutral check after a pause: “What do you think the puzzle is asking you to do right now?” If they ask what a word means, note the word before clarifying it. Avoid giving a hint at the same time, because a hint can change what you are trying to observe. If several people struggle at the same phrase, inspect that wording; if they describe the goal consistently but try different clue combinations, note where their reasoning paths diverge.

Here is a hypothetical example. Suppose a puzzle says, “Put the blue card after the red card and before the green card,” but its layout uses a circle of spaces. One solver might read “after” as clockwise; another might read it as later in a sequence. That difference suggests the instruction leaves the ordering convention unclear. If all solvers agree that the cards go in a line but need to combine several clues to find the order, the challenge may be in the reasoning instead.

A diagnosis entry could look like this:

Puzzle: [name or version] Observed moment: Solver paused at “after the red card.” Solver’s interpretation: “Clockwise from the red card.” Other interpretation observed: “Later in the row.” What they thought was missing: “Which direction counts as after?” Tentative finding: Wording or convention may be unclear. Next test: Clarify the ordering convention, then ask a new solver to restate the rule before solving.

The example does not prove which wording is best. It shows how to record competing interpretations so you can test a specific change rather than rewriting the whole puzzle.

Change one thing at a time. If solvers disagree about a rule, rewrite that rule while keeping the clues and answer the same. Then check whether a new solver interprets the instruction consistently. If the rule is understood but the reasoning is too demanding for your intended audience, consider changing the number of clues, the amount of information to combine, or whether a small hint is available. State your intended audience and desired challenge level as assumptions; different solvers may experience the same puzzle differently.

After a change, compare notes from another attempt. Did the same interpretation problem disappear? Did solvers still need to work through the intended deduction? Keep the old version and your observations so you can tell what changed. If evidence is mixed, say so in your notes instead of labeling the puzzle definitively “too hard” or “unclear.”