Rationality

At the same time, he didn't hide his fears and doubts, but tried hard to keep his calm and rationality in facing every difficulty.

Source: tatoeba (607617)

The logic and necessity of the new generation — and what they are so furiously opposed to — must be seen against a background of what has gone wrong in America. It must be understood in light of the betrayal and loss of the American dream, the rise of the Corporate State of the 1960's, and the way in which that State dominates, exploits, and ultimately destroys both nature and man. Its rationality must be measured against the insanity of existing "reason" — reason that makes impoverishment, dehumanization, and even war appear to be logical and necessary. Its logic must be read from the fact that Americans have lost control of the machinery of their society, and only new values and a new culture can restore control. Its emotions and spirit can be comprehended only by seeing contemporary America through the eyes of the new generation.

Source: tatoeba (6211477)

It's not that suicide is always insane, but generally, nobody kills themselves in a fit of rationality.

Source: tatoeba (10646283)

I read the research paper "Linguistic relativism and the basic expression of rationality in Inuktitut."

Source: tatoeba (10671571)