Inside of your mind, an idea can be fuzzy, amorphous, a cloud of vibes.

But to transmit it outside your mind requires distilling it.

Crunching it down to something more specific.

Transmuting it into a small package.

A seed of a thought.

That process requires you to hold the idea much more concretely, which helps you find its flaws better.

This is one reason dialogue is necessary for rigorous thinking.

If it's fully in your mind you never need to distill it deeply enough to interrogate it.

Dialogue is useful not just because you get the benefit of adversarial feedback and sources of disconfirming evidence.

It's also useful because it forces you to distill your fuzzy idea vibes into concrete arguments.