Keep the conditions attached to each step.
Review exact counts, combined conditions and negative conclusions. Six answers form a small practice record rather than a profile of a person.
A correct count describes six selected tasks in this section. It is not a reasoning rank or professional qualification. Every count opens all explanations and this complete guide.
A chain has several checkable steps
This section combines more than one rule or fact. Its count cannot tell you whether a mistake came from reading, attention, an unfamiliar phrase or an incorrect inference. Use the full item explanation to locate the step instead. All six answers and explanations remain visible at every score. There is no gate that makes a low attempt buy access to review, and no high-score label that establishes suitability for a particular profession.
Maintain a small fact list
Start with facts explicitly given, then add each derived fact beside the rule that supports it. A rule requiring P and Q needs both facts before it can fire. An exact-count condition needs its positive and negative restrictions kept together. If a chain derives not remote, keep that precise conclusion rather than silently replacing it with an assumed alternative such as in-person. The stated universe may contain other possibilities that have not yet been excluded.
Combine a state with an exact count
Suppose exactly two of sensors Copper, Indigo and Pearl are active, and Pearl is inactive. Copper and Indigo must both be active because only those two can satisfy the required count. If the rule had said “at most two”, neither conclusion would be forced; all three inactive would fit. If it had said “at least two”, the present inactive fact would still force the two remaining sensors, but the unrestricted rule would also allow three active.
Do not confuse exclusion with identification
Learning that an event was not in the morning does not place it in the evening unless all alternatives are explicitly limited to those two choices. Similarly, a conclusion required by the premises need not explain why the fictional event happened. Keep causation, likelihood and logical necessity separate. When a statement contains “unless” or “if and only if”, use the meaning explicitly given in the question instead of importing an everyday conversational reading.
Review the first unsupported step
Choose a tempting wrong answer and identify the first extra assumption it needs. You may discover that an otherwise sensible chain used only one half of a conjunction, dropped a count restriction or chose an unnamed alternative. Write a corrected chain in ordinary language and test it on a fresh example. Repeating the original set can help recall its method, but the result has no norms, reliability study or admissions conversion; changes between attempts remain changes on familiar practice items.