Is this a false fallacy? If somethong can learn, it can be trained, and that's the dictionary definition of train: "to teach so as to make fit, qualified, or proficient".
The fallacy is "if it can be trained, it is therefore logically a muscle".
Ask your same dictionary to define muscle, and ask yourself if the immune system is a "band or bundle of fibrous tissue in a human or animal body that has the ability to contract".
That's an absolutely textbook https://en.wikipedia.org/wiki/Association_fallacy
Is this a false fallacy? If somethong can learn, it can be trained, and that's the dictionary definition of train: "to teach so as to make fit, qualified, or proficient".
The fallacy is "if it can be trained, it is therefore logically a muscle".
Ask your same dictionary to define muscle, and ask yourself if the immune system is a "band or bundle of fibrous tissue in a human or animal body that has the ability to contract".