In the opening paragraphs, he confused weather models and climate models. They’re not even remotely the same codes! One uses fluid dynamics, the other has input

In the opening paragraphs, he confused weather models and climate models. They’re not even remotely the same codes! One uses fluid dynamics, the other has inputs such as the precise absorption spectrum of isotopic variants of ionised molecules at low pressures! We can’t predict where the bubbles will form in a boiling pot of water, but we can predict that it’ll boil at 100 degrees C.