with certainty

certainly easily emphatically firmly undoubtedly

amen assuredly categorically doubtless doubtlessly flat flat out for a fact indubitably no catch no holds barred no ifs ands or buts no kicker no strings attached on the money on the nose really truly right on sure surely the ticket to a tee undeniably unequivocally unmistakably unquestionably without qualification

doubtfully questionably

absolutely assuredly certainly clearly definitely evidently indeed inevitably inexorably plainly undoubtedly unquestionably

admittedly beyond doubt beyond shadow of doubt come what may conclusively decidedly distinctly doubtlessly explicitly fixedly for certain indubitably infallibly irrefutably manifestly nothing else but positively rain or shine to be sure unequivocally unerringly unfailingly unmistakably unshakably without fail

doubtfully dubiously indefinite indefinitely questionably vaguely

uncertain