Not remotely true.
"Not remotely true."
Sure it is. Take a naked human and put him in the middle of a frozen tundra. His naked flesh will freeze in minutes. The only real food around, the various mammals, large and small, are too fast for him to grab with his hands. Even if he did catch one, he would surely be killed, if not he couldn't eat the raw flesh.
The only adaptation that will allow his survival is his intelligence.