show once and for all

confirm convince demonstrate determine explain find justify result show substantiate test try turn out validate verify

affirm analyze ascertain assay attest authenticate back certify check corroborate declare document evidence evince examine experiment fix manifest settle sustain testify uphold warrant witness

add up bear out end up have a case make evident pan out show clearly trial

conceal confuse deny disprove hide invalidate miss refuse veto

aid assist contradict disavow disclaim help refute reject unsettle

discredit hypothesize theorize