conjectural

existing only as an assumption or speculation a necessarily conjectural account of Shakespeare's life, since there is so little hard information Synonyms academic (also academical), theoretical, hypothetical, speculative, suppositionalRelated Words alleged, assumed, presumed, presupposed, proposed, supposed, unproved, unproven, untested; debatable, moot; abstract, conceptual, intellectual, metaphysical; nonclinical, nonpractical; nonempiricalNear Antonyms clinical, practical; concrete, defined, definite, distinct; attested, authenticated, confirmed, demonstrated, established, proven, substantiated, tested, time-tested, validated, verified; empirical (also empiric), nonspeculative, nontheoretical, observationalAntonyms actual, factual, real