DarkDespair5 Posted:

How are we certain a multiverse cannot be real, especially if legitimate scientific hypotheses explore its possibility?

Never said it couldn’t be. However, to presume that some would have different laws clearly rules out all interaction. If they have the same laws, I would think they’d be the “infinite possibilities” versions, where each decision we make is played out in different universes. And there’s still no way to have interaction.