won't hold water

dubious farfetched flimsy impossible improbable inconceivable incredible unbelievable unconvincing unreasonable

doubtful far-out fishy for the birds full of holes obscure problematic puzzling reachy suspect thin too much unsubstantial weak won't wash

believable convincing credible likely plausible possible realistic reasonable tenable

astonishing implausible impossible improbable inconceivable incredible outlandish preposterous too much unimaginable unthinkable

beyond belief cockamamie cockeyed doubtful dubious far-fetched fishy flaky flimsy for the birds full of holes harebrained incogitable kooky lamebrained open to doubt past belief phony questionable reaching scatterbrained screwy staggering suspect thick thin unconvincing unsubstantial weak won't wash

believable conceivable credible imaginable likely plausible possible reasonable tenable

real

doubtful dubious far-out farfetched fishy flimsy for the birds full of holes impossible improbable inconceivable incredible obscure problematic puzzling reachy shaky suspect thin too much unbelievable unconvincing unreasonable unsubstantial weak won't wash