Logic of a Time-Travelling Stegosaurus

"I hope you don't mind me helping, but it looked like you were having problems down there." "You're a Stegosaurus!" "I am an inventor. I have invented the thing we are travelling in, which I call Professor Steg's Floaty-Ball-Person-Carrier." "I call it a balloon." "Professor Steg's Floaty-Ball-Person-Carrier is the original name, and right now we are one hundred and fifty million years in the future." "Actually, we are about three hundred years in the past." "Do you like hard-hairy-wet-white-crunchers?" "Coconuts?" "I named them first." "Hang on, those are diamonds. And sapphires. And rubies." "Actually, I call them special-shiny-clear-stones, special-shiny-bluey-stones, and, um-" "Special-shiny-red-stones?" "Indeed, I called them that when I was inventing my Really-Good-Moves-Around-in-Time-Machine, one hundred and fifty million years ago." "Well, it was very lucky for me that you turned up when you did and rescued me. I am slightly lost in space and time right now and need to get home in order to make sure my children have milk for their breakfast. This is the milk. Although I expect that one hundred and fifty million years ago you called it 'wet-white-drinky-stuff'." "Rinosaurs are reptiles, sir. We do not go in for milk" "Do you go in for breakfast cereal?" "Of course! Dinosaurs love breakfast cereal. Especially the kind with nuts in." "What do you have on your cereal?" "Orange juice, mostly. Or we just eat it dry. But I shall put his in my book. In the distant future, small mammals out milk on their breakfast cereal. I shall write a wonderful book, when I return to the present."