Stephen Hawking: legendary scientist, explainer of complex theories about physics [1] and cosmology. But there's one thing he can't explain — Donald Trump.

While making an appearance on the Good Morning Britain show in the UK, he was asked to describe the rise of the presumptive GOP presidential nominee [2].

"I can't," he answered, according to CNN. "He is a demagogue who seems to appeal to the lowest common denominator."

From 6am my interview with Stephen Hawking.On Brexit:"Gone are the days we could stand on our own" On Trump: "He's a demagogue" @GMB [3]

— Mark Austin (@markaustinitv) May 31, 2016 [4]

Hawking is certainly not the only person to shut down Trump [5] after his incendiary comments.