Ambiguous
Open to two or more interpretations, often intended to mislead.
As in:
His last five sentences in a row were ambiguous, each more vague than the last, leaving Kat to bang her head repeatedly against the nearest wall in frustration.
Common synonyms and related words include unclear, fuzzy, perplexing.
Antonyms include clear, specific, definite.
Kat likes the antonyms best.