In this excellent interview, eminent physicist George F. R. Ellis discusses the ill-advised direction in which some scientists are going:
Horgan: Physicist Sean Carroll has argued that falsifiability is overrated as a criterion for judging whether theories should be taken seriously. Do you agree?
Ellis: This is a major step backwards to before the evidence-based scientific revolution initiated by Galileo and Newton. The basic idea is that our speculative theories, extrapolating into the unknown and into untestable areas from well-tested areas of physics, are so good they have to be true. History proves that is the path to delusion: just because you have a good theory does not prove it is true. The other defence is that there is no other game in town. But there may not be any such game.
Scientists should strongly resist such an attack on the very foundations of its own success. Luckily it is a very small subset of scientists who are making this proposal.
It is indeed a very small subset, but it is also a very vocal and visible subset–many of these scientists are in the popular media as representatives of science. Ellis also takes them to task for formally rejecting philosophy while unwittingly engaging in a weak form of it.
The great irony here is that many of the atheists who are self-styled champions of evidence and reason are abandoning both when they claim that the multiverse hypothesis, or any other fundamentally untestable idea put forth by scientists, is very likely true, because it’s elegant or the math is convincing or it’s beautifully consistent with what we believe, and so on. I have to check myself here, too, because I find some of these untestable ideas compelling for the same reasons. But, in terms of the irony, as Ellis points out, it was Galileo and Newton—both Christians—who revolutionized science by making it primarily an experimental, evidence-based endeavor, and now this is being dismissed by those who also ostensibly dismiss faith; they have abandoned evidence and reason in favor of what may only be a beautiful delusion.
I strongly encourage you to read the entire interview with Ellis (who is himself a Christian, incidentally) for an engaging discussion of what’s going awry on the modern scientific landscape.