aberrant, absurd, batty, bonkers, crazed, cuckoo, daft, delirious, demented, deranged, distracted, fantastic, foolhardy, foolish, frantic, frenetic, frenzied, illogical, imprudent, insane, invalid, irrational, kooky, loony, ludicrous, lunatic, mental, nonsensical, nuts, nutty, preposterous, psychotic, rabid, raving, screwy, senseless, unbalanced,
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