According to somebody
What a man has not been reasoned into he cannot be reasoned out of.
I’ve seen it attributed to Swift. And I’ve also seen
You can’t reason someone out of something they weren’t reasoned into.
attributed to both Swift and Twain.
More importantly, is it true? Sounds too extreme to me. Reason has no power to guide ourselves or others forward on the journey out of error?
On the other hand, according to Hacker’s Law
The belief that enhanced understanding will necessarily stir a nation to action is one of mankind’s oldest illusions.