I don't at all understand where your confusion lies, but be assured that undecidability/noncomputability isn't "hokum". It's probably "regurgitated" in the sens

I don't at all understand where your confusion lies, but be assured that undecidability/noncomputability isn't "hokum". It's probably "regurgitated" in the sense that this is covered in about every "intro CS" textbook, lecture, etc. because it forms the basis of theoretical CS.