25B6; adjective
half-baked theories : ILL-CONCEIVED, hare-brained, ill-judged, impractical, unrealistic, unworkable, ridiculous, absurd; informal crazy, crackpot, cock-eyed.
her half-baked young nephew : FOOLISH, stupid, silly, idiotic, simple-minded, feeble-minded, empty-headed, feather-brained, feather-headed, brainless, witless, unintelligent, ignorant; informal dim, dopey, dumb, gormless, thick, half-witted, dim-witted, birdbrained; Brit. informal daft, divvy, dozy.
sensible.