In pop culture, there are ideas that paleolithic humans and dinosaurs lived together. The Flintstones is the most famous example of this idea. This obviously wasn't the case in reality, but what if by happenstance, the K-T extinction didn't happen but mankind evolved anyway? Then caveman and dinosaurs would be alive at the same time. Could these cavemen then tame and ride a T-rex?
There are many roles a domesticated animal can be used for. The major ones are farm labor, dairy production, meat production, clothing production, transportation, pets, pest control, egg production, and hunting/guarding. Other animal roles include things like experimentation and sending messages and a few other things I have missed.
An animal needs 3 main qualities in order to be domesticated. Firstly, it must be able to be controlled by humans. It cannot be too large and dangerous. It also cannot easily disrupt human efforts to control it. Secondly, it must make a lot of babies in a short amount of time. That way, selective breeding and culling of the unwanted offspring can happen. Finally, feeding this animal must be easy. Ideally, the animal eats things humans don't eat like grass but any animal that overall eats less than a human can work.
So given these qualities, could stone age humans domesticate the Tyrannosaurus Rex the same way they domesticated other animals like dogs and sheep? I have a strong feeling that the answer is no because a T-Rex doesn't have good domestication qualities although they would be useful as transportation. However, some people in my previous question claim that any animal could be domesticated and I want to see their reaction to this question.