Incontrovertibly

It is, incontrovertibly, our duty, if divine and civil laws have given us a rule whereby to regulate our conduct, and which may both promote the benefit of society and the good of the individual, we are obliged to act agreeably to that rule, let the conduct of others be what it may.

Source: wiktionary

In such a case and under such proof the intent to kill and the deliberate and premeditated malice are incontrovertibly implied.

Source: wiktionary

And if word did spread that he had withdrawn his money from the bank in cash, every man and his cousin in the county would be his threat and enemy until every one of them was incontrovertibly convinced that the actual money actually was somewhere else, and exactly where that somewhere else was.

Source: wiktionary