argumentation
logical argument
argument , ****
line of reasoning
line *****

That line of reasoning ran toward thoughts she would rather not consider.

She was about to give up on the line of reasoning, but Human continued.

It wasn't a line of reasoning he wanted to pursue.

Firmly, she put a stop to that line of reasoning.

You young guys today can't seem to follow a simple line of reasoning.

Oh, I've followed the same line of reasoning as you have.

But that line of reasoning has not been particularly well received here.

Why be so surprised by such an obvious line of reasoning?

I can see your whole line of reasoning, my man.

It looked as if they might be able to get somewhere with this line of reasoning.