Technically it is a hypothesis which does not yet have a good experimental design that might prove or falsify it. And in that aspect it isn't "canon" so it isn'

Technically it is a hypothesis which does not yet have a good experimental design that might prove or falsify it. And in that aspect it isn't "canon" so it isn't "reality." But it is far from being a preposterous idea, and there are labs that are working on various ideas on how one might prove or disprove it.