- A dinosaur is a kind of reptile
- A reptile is a kind of animal
- Therefore, a dinosaur is a kind of animal

- A dinosaur is a kind of animal
- If fossils of an animal or plant are found in a place then that animal or plant used to live in that place
- Fossils of dinosaurs are found in antarctica
- Therefore, dinosaurs used to live in antarctica

- A dinosaur is a kind of reptile
- A reptile is cold-blooded
- Hence, dinosaurs are cold-blooded

- A dinosaur is a kind of animal
- Dinosaurs are cold-blooded
- So, dinosaurs are cold-blooded animals

- Dinosaurs are cold-blooded animals
- Cold-blooded animals cannot live in cold environments
- Hence, dinosaurs cannot live in cold environments

- Dinosaurs used to live in antarctica
- Dinosaurs cannot live in cold environments
- Hence, antarctica was not a cold environment when dinosaurs used to live in antarctica

Hence, antarctica was not a cold environment when dinosaurs used to live in antarctica
Question
Currently, Antarctica is the coldest and driest place on Earth. Paleontologists have found dinosaur fossils in rock layers below the ice. Based on this evidence, which is a reasonable conclusion about the climate of Antarctica in the past?

Context
- If fossils of an animal or plant are found in a place then that animal or plant used to live in that place 
- Fossils of dinosaurs are found in antarctica 
- A dinosaur is a kind of reptile 
- A reptile is a kind of animal 
- Cold-blooded animals cannot live in cold environments 
- A reptile is cold-blooded