[i]The physics community continues to fiercely debate the multiverse hypothesis. Prominent physicists disagree about whether the multiverse may exist, and whether it is even a legitimate topic of scientific inquiry. Serious concerns have been raised about whether attempts to exempt the multiverse from experimental verification may erode public confidence in science and ultimately damage the nature of fundamental physics.  Some have argued that the multiverse question is philosophical rather than scientific because it lacks falsifiability; the ability to disprove a theory by means of scientific experiment has always been part of the accepted scientific method.  Paul Steinhardt has famously argued that no experiment can rule out a theory if it provides for all possible outcomes.[/i] It's not claimed to be a fact dude. It's just an idea. You're getting annoyed about science coming up with an idea and trying to find ways to investigate it. Science isn't abandoning its foundations and starting to make blind assumptions; we have an idea, we investigate it, and while we do that we tend to get excited about what we might find and discuss it a lot.