(of facts, evidence etc) convincing; removing all doubt

definite, final

protected (from disease, danger, punishment etc); not able to be affected (by); protected (against)

invulnerable

that cannot be denied or proved false

beyond question

(especially) (doing things, done) without a proper sense of responsibility

careless, reckless

that cannot be disagreed with

definite, final

undoubtedly true

definite, proven

genuine and acceptable because made or done with the correct formalities; that can be legally used; (of arguments, reasons etc) acceptable

right, genuine