Every theory presented as a scientific concept is just that; it's a theory that tries to explain more about the world than previous theories have done. It is open to being challenged and to being proven incorrect.
“I've played Henry Fonda's mother so often that, whenever we run into each other, I call him 'son' and he calls me 'Ma', just to save time.”
“Once I started performing I knew that's what I wanted to do with my life. But you have to work really hard to be a performer.”