Problematical

Adjective

 * 1) doubtful or disputed
 * 2) dubious or ambiguous

Thesaurus
a bit thick, a bit thin, absurd, arguable, at issue, baffling, bewildering, beyond belief, bothering, confounding, confusing, confutable, conjectural, contestable, controversial, controvertible, debatable, deniable, discomposing, disconcerting, dismaying, disputable, distracting, disturbing, doubtable, doubtful, dubious, dubitable, embarrassing, enigmatic, hard of belief, hard to believe, iffy, implausible, in dispute, in doubt, in dubio, in question, inconceivable, incredible, intricate, mistakable, moot, mysterious, mystifying, not deserving belief, open to doubt, open to question, open to suspicion, passing belief, perplexing, perturbing, preposterous, problematic, puzzling, questionable, refutable, ridiculous, speculative, staggering belief, suppositional, suspect, suspicious, tall, thick, thin, unbelievable, unconvincing, unearthly, ungodly, unimaginable, unthinkable, unworthy of belief, upsetting

Synonyms

 * problematic