If Donald Trump was asked "If oxygen was discovered in 1783, how could human breathe before", this would probably be his answer.

I have to say a lot of people have been asking this question. No, really. A lot of people come up to me, and they ask me. They say, 'How do people breathe before the discovery of oxygen'? And I tell them, look, we know what oxygen is. We've had almost eight years of the worst kind of chemistry you can imagine. Oh, my God, I can't believe it. Without the discovery of oxygen, the world would be terrible. It's just terrible. Look, if you want to know what oxygen is, do you want to know what oxygen is? I'll tell you. First of all, it's the O in the periodic table. By the way, I love the element O. It's probably my favorite element, no it is my favorite element despite I don't know what O is. You know what, it's probably more like the Hydrogen but with a lot of proton in it. A lot. If I'm being honest, I mean, if I'm being honest. I like a lot of proton. Except for Marco Rubio, now he's a neutron that I don't like. Though, I probably shouldn't say that. He's a nice guy, but he's like, 'Helium, Neon,' on and on, like that. He's inert! You know what I mean? He's like a inert gas. I don't know. I mean, you know. So, we have all these proton, and we can add them and subtract them and add them. TIMES them even. Did you know that? We can times them OR divide them, they don't tell you that, and I'll tell you, no one is better at the order of periodic table than me. You wouldn't believe it. So, we're gonna be the best on breathing oxygen, believe me.