[keybored]

Reasoning is the slave of the passions. That’s the way it is and the only way it can work.

Something needs to motivate someone to argue for or against something. Yes, this is I guess called motivated reasoning. And when their argument X is disproven—do they fold? Not if sufficiently motivated; then they move on to argument Y.

This is not fallacious. It is merely, quite often, done in a rude manner since most people do not seem to add any acknowledgement about being wrong about argument X. They simply move to argument Y without any ceremony.

Good form would be: Okay, I see now that argument X is wrong. However, I would next like to present argument Y...