这个三段论很清晰：所有鸟类都会飞；企鹅是鸟类；所以企鹅会飞。

Here's a clear ___syllogism: All birds can fly; penguins are birds; therefore, penguins can fly.

这个哲学问题可以用简单的三段论来解释。

This philosophical problem can be explained with a simple ___syllogism.