"The issue of testability has been lurking for a decade." I guess he means it's become too big to ignore, for one of the things I remember about string theory

"The issue of testability has been lurking for a decade." I guess he means it's become too big to ignore, for one of the things I remember about string theory when I first learned of it in the mid-late '80s was that at that time the string theorists couldn't conceive of a way to test it.