hypothetic, theoretical, theoretic, suppositional, conjectural, suppositionary, opinative, hypothetico-deductivist, commentitious, theoremic, more...

actual, real, factual, concrete, practical

counterfactual, subjunctive, fictional, more...

based on assumption,   supposed case,   what if,   they might be false,   not actual,   like a theorum,   only in theory,   beyond a fact,   but what if,   for arguments sake