convincingly

decisively definitively

determinately once and for all once for all positively

certainly completely decisively definitely permanently

lastly

assuredly beyond recall beyond shadow of doubt conclusively determinately done with enduringly for all time for ever for good in conclusion inescapably inexorably irrevocably once and for all past regret settled with conviction

doubtfully dubiously questionably

inconclusively

adequately competently sufficiently

suitably