"This must be heaven," Caleb reasoned more to himself than the woman as he watched her through half closed eyes.
He says we shouldn't do any better, in their place; just as if one could reason from them to us, you know.
I reason to myself that pets are good for children, so why shouldn't we get some more?
From such a particular we can reason to another generality.
It is also much easier to reason about as a user, largely due to its intuitiveness.
Everything will go fine, she reasoned to herself, tracing a path through the bubbles.
Nevertheless, the office within must sometimes have an occupant - at least so Mann reasoned to himself.
What is important is how he reasons his way to them.
Finally, it's always dangerous to assume that you can simply reason your way to conclusions without bothering with supporting evidence.
I reason here from the first to the second.