If observed facts of undoubted accuracy will not fit any of the alternatives it leaves open, the system itself is in need of reconstruction.
I have resolved to demonstrate by a certain and undoubted course of argument, or to deduce from the very condition of human nature, not what is new and unheard of, but only such things as agree best with practice.
What a solace Christianity must be to one who has an undoubted conviction of its truth!
It is a maxim, that those, to whom everybody allows the second place, have an undoubted title to the first.
A few persons of an odious and despised country could not have filled the world with believers, had they not shown undoubted credentials from the divine person who sent them on such a message.
The short story, its course plotted and its form proscribed, has become too efficient. . . but efficiency is not the most, it is perhaps the least, important among the undoubted elements of good literature