See e.g. Smerity reporting on Elon's talk in NIPS 2017: https://twitter.com/Smerity/status/938994837323259904
as well as
https://goo.gl/trX8SJ & https://goo.gl/aTMqv6
What's your evidence for saying he does not say so? A bit mean of you to downvote without asking for evidence.