borderline case (?.)

• aliene
• bedlamite
• blind bargain
• chance
• contingency
• crackbrain
• crackpot
• dement
• demoniac
• double contingency
• energumen
• fanatic
• flake
• fou
• gamble
• guess
• idiot
• kook
• loon
• loony
• lunatic
• madman
• maniac
• meshuggenah
• noncompos
• nut
• open question
• phrenetic
• piece of guesswork
• question
• raving lunatic
• screwball
• sight-unseen transaction
• toss-up
• touch and go
• undecided issue
• wager
• weirdo