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