racjonalny rozsądny Englisch:

His argument is rational.

Robinson is a practical, rational and brave man.

Her way of thinking was rational.

Although the arguments were rational, he was not convinced.

The opinions that are held with passion are always those for which no good ground exists; indeed the passion is the measure of the holder's lack of rational conviction. Opinions in politics and religion are almost always held passionately.

But if we were wholly rational, would we want children at all?

No rational person, of whatever political persuasion, could possibly object to the program.

Of all the ways of defining man, the worst is the one which makes him out to be a rational animal.

Religion, which should most distinguish us from the beasts, and ought most particularly elevate us, as rational creatures, above brutes, is that wherein men often appear most irrational, and more senseless than beasts.

If they were rational, they wouldn't have those problems.

a rational argument/debate/explanation

Parents need to be fully informed so they can make a rational decision.

Everything I'm doing is rational from my point of view.

What you say makes no sense! You are not basing your argument on rational assumptions.

Are parents rational about their children?