'x is y': Elon Musk sent a cryptic tweet in response to his partner Grimes as rumors about her apparent pregnancy swirl
6:19am PST - January 10th, 2020 grimes - Business InsiderElon Musk posted a cryptic message in reply to photos of his girlfriend Grimes with an apparent baby bump saying "x is y" on Friday. It is not clear what the message means, or whether it could be a confirmation of the pregnancy rumors that have been circulati…