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E.g.,=0A= =0A= (read-multiple-choice "prompt" '((?a "alpha")))=0A= ;; prompt (alpha, ?):=0A= ^=0A= How can I discard it?=0A= =0A= Moreover, if evaluating=0A= =0A= (read-multiple-choice "prompt" '((?? "question")))=0A= ;; prompt (? question, ?):=0A= ^ ^=0A= How to distinguish them?=