implausibly, improbably, incredibly, unbelievably

plausibly, persuasively, convincingly, competently, truthfully, coherently, objectively, effectively, forthrightly, cogently, legitimately, realistically, definitively, honestly, forcefully, meaningfully, implicitly, straightforwardly, disingenuously, compellingly, authoritatively, baldly, rhetorically, accurately, transparently, assertively, unconvincingly, confidently, articulately, adequately, toughly, glibly, logically, concretely, pragmatically, substantively, sufficiently, intelligently, skillfully, accountably, plainly, eloquently, furthermore, feasibly, comprehensibly, rationally, reasonably, robustly, frontally, democratically, ably, complexly, unambiguously, adroitly, justly, independently, boldly, unequivocally, authentically, satisfactorily, explicitly, energetically, capably, readily, consistently, dispassionately, durably, intelligibly, somehow, mendaciously, incontrovertibly, humanly, reliably, indeed, circumstanced, conclusively, factually, blithely, impartially, arrogantly, affirmatively, equivocally, actually, ineptly, idealistically, complacently, stridently, appropriately, responsibly, lucidly, simply, sensibly, concisely, interpretively, unflinchingly, militarily, properly, bombastically, uncontroversially, creditably, powerfully, precisely, appended, audited, credible, phony, sworn, unqualified, yet, absurd, actionable, admiralty, adverse, advertised, amended, apostles, arrogant, audacious, ballyhooed, barthian, baseless, behaviorist

believably, probably