Isn’t it great when you learn something new. I was always informed they could yet having not worked with them yet in my career it’s never been something to question. Yet now I have been properly informed it would seem somethings we all have learnt and known is completely different. Yet if a predator was to attack a porcupine the quills will detach very easily and will latch onto their skin. This is where the misinformation comes from :)!