My point is that a claim cannot be made that categorically LC tests are generally a test on memorization. It appears your point does not disprove that. You mention exceptions, that in fact proves the general rule is true (I.e your claim isn’t of the form: most leet code questions of almost any level cannot answered without spending 45 mins and requiring specialized domain knowledge as a prerequisite). You cannot argue against general rule by pointing out specialized exceptions. Cats generally have 4 legs as a rule. Yes exceptional conditions exists where they don’t have 4 legs, but the generally rule holds true. To argue against, your point must take the form: “as a rule, most cats do not have 4 legs.” Do you understand?