(a.) Resting on supposition; hypothetical; conjectural; supposed.

accounted as alleged arguable assumed assumptive at issue confutable conjectural conjectured contestable controversial controvertible debatable deemed deniable disputable doubtable doubtful dubious dubitable given granted hypothetical iffy in dispute in doubt in dubio in question inferred mistakable moot open to doubt open to question postulated postulational premised presumed presumptive problematic putative questionable refutable reputed speculative supposed supposititious suppositive suppository suspect suspicious taken for granted understood