He may very well have. There is not a shred of experimental evidence for the multiverse. In fact, experimental evidence is not even possible. That places it firmly in the pantheon of metaphysics.
Now it could be an unescapable conclusion from an otherwise very successful theory with many experimental verifications, but unfortunately the article neglects to mention that there are many alternative interpretations and theories that can equally well explain 'how it all started' and still result in inflation and all associated theories.
That the multiverse theory successfully appeals to the imagination is the main pillar of its succes.
It's a shame he is being downvoted for succinctly stating a plain truth.
