Penrose's theorem is more restricted and only holds when matter obeys a stronger energy condition, called the dominant energy condition, in which the "energy is larger than the pressure".
(inverted commas mine)
How can we compare 2 very different physical quantities of pressure and energy? I have thought some possibilities: 1. The wikipedia page has a mistake. 2. It's simply energy is in large amount for the black-hole , bur pressure is low. 3.Some counterintuitive higher- level physics relation between those 2 quantities (It's very counterintuitive to me because my physics knowledge is very much limited to A level physics.)
But which of the 3 possibilties is true? Any wise words?