We know of cases where, due to living early years in isolation, a human being was prevented from learning full-fledged language, e.g. Genie.[0] [0] https://en.

We know of cases where, due to living early years in isolation, a human being was prevented from learning full-fledged language, e.g. Genie.[0] [0] https://en.wikipedia.org/wiki/Genie_(feral_child) https://en.wikipedia.org/wiki/Genie_(feral_child)