Well, no. That’s clearly not what he’s saying.
What he IS saying is that you can’t consume infinite keto calories and not expect to gain weight. Saying that calories matter does not imply all calories matter equally, or any of a thousand straw men.
Alex’s 10,000 calories from fat experiment has several possible outcomes:
1 - He can’t do it. He just can’t eat that much without getting sick and not being able to keep down.
2 - He can’t absorb. He poops out some amount of fat, undigested.
3 - He compensates by ramping up metabolism to 10,000 calories or more per day.
4 - He gains weight.
3 is certainly possible, but it’s probably the least likely outcome. But IF you can absorb the calories, there will be a level at which activity and metabolism can’t compensate.
Metabolisms are adaptive, within limits that vary. There absolutely are people for whom you need to ramp up 10,000 calories to gain weight. It’s not, from overfeeding studies, a lot of people.
I can tell you, with absolute certainty because I have actually done it, that I can maintain a 280 pound body eating just unprocessed meat. And that to lose weight I need to consciously look at consumption.
That doesn’t mean everyone does.
There’s the pretty reasonable argument that CICO doesn’t work IN THE LONG TERM.Then there’s the patently ridiculous one, which has come up in this thread, that it doesn’t work in the short term. It does.