Hypotheses of dinosaur extinction 5) two students are debating the hypotheses of dinosaur extinctions. student 1: i think that the meteorite and volcano statements are valid hypotheses, but the other two are not. you can't test the fossil record to find out if they are true, and they don't explain animals other than dinosaurs going extinct. student 2: / think that all of the statements are all valid scientific hypotheses explaining dinosaur extinctions. i saw all of them on a dinosaur program on tv, and they all seem possible. no person was there to watch the dinosaur extinction, so all of the scenarios are hypotheses. with which student do you agree? why?