Receiving the benefit of the doubt

Just back from the doc, getting a refill, where the following conversation happened:

Doctor
You’ve lost a kilogram! That’s good!
Guy Jean
Really?
Doc
I’ll bet you’re not going out drinking as much these days because of the Coronavirus, right?
GJ
Er … right.
Doc
A lot of people are drinking out less, and losing weight as a result.
GJ
Interesting theory …

Well, we’ve cut down going out a little bit. But it’s not as if we’re not making up for it at home …