I've been wondering if falsifiability is misunderstood, based on what a few people have commented about it. The alternative version is only that if claims are made that a system has made specific predictions that proved to be true, then it should be falsifiable on that basis. This was Popper's criticism of Marxists claiming Marxism was scientific - they would constantly claim that Marxism can predict what already happened, but it's bogus to claim this in retrospect, they repeatedly claimed this for occurrances only after they had occurred. Is this the same as demanding every theory be falsifiable?
Sean Carroll talks pretty positively about string theory. I think he paints the picture that although the popular view is it's not falsifiable (or not yet), therefore it's somewhere between very suspicious and junk, but actual theoretical physicists are much more positive about it.
Sean Carroll talks pretty positively about string theory. I think he paints the picture that although the popular view is it's not falsifiable (or not yet), therefore it's somewhere between very suspicious and junk, but actual theoretical physicists are much more positive about it.