T-Rex: I have discovered a new philosophy for life that appeals to my own sense of self-worth!
T-Rex: Egoism!
T-Rex: In egoism, all your actions are motivated by a desire to make things easy for one person: yourself! For instance, I crush this house because it's in my way. My actions are justified, thanks to egoism!
Dromiceiomimus: But what about yourself? You're only here because your parents selflessly decided to have children. Your very existance is against egoism.
T-Rex: They probably realized what a great dinosaur I'd be and figured it would be in their own interests to create me!
Utahraptor: What the hell?
Utahraptor: First off, I don't know why you need egoism to justify the destruction you're going to wreak ANYWAY. Second off, egoism doesn't account for charity, unless you reduce it to 'good will in the bank', saved for some future benefit. That in turn doesn't account for charity seen in lesser animals, who aren't cognizant of such self-centered account-keeping. In conclusion: it's untenable.
T-Rex: "In conclusion: it's untenable"?
T-Rex: YOU MUST BE A LOT OF FUN AT PARTIES!
