Premise 1: All geckos are lizards. Premise 2: All lizards are reptiles. Which of the following is a valid conclusion for the two premises?

Question

Premise 1: All geckos are lizards.

Premise 2: All lizards are reptiles.

Which of the following is a valid conclusion for the two premises?

1. Therefore, all reptiles are lizards. 
2. Therefore, all lizards are geckos. 
3. Therefore, all geckos are reptiles. 
4. Therefore, all reptiles are geckos.

Answer 1

3) all geckos are reptiles

if you aren't into biology or animals, change the words to something you're more familiar with

all boys are males, all males are human, therefore all boys are human

(unless they're "boy monkeys"?)

this comes in philosophy logic courses, the Socratic syllogism

Socrates is human

all humans are mortal

Socrates is mortal

P is Q

all Q are R

P is R

or

All P are Q

All Q are R

All P are R

geckos? wasn't there a commercial on TV like that?

Answer 2

The correct answer choice is (3).