- A telescope is used for observing planets
- Venus is a kind of planet
- So, a telescope can be used for observing venus

- A telescope can be used for observing venus
- Venus has moon-like phases
- Therefore, a telescope can be used to observe the moon-like phases of venus

Therefore, a telescope can be used to observe the moon-like phases of venus
Question
Which of the following can only be seen with a telescope?

Context
- Venus has moon-like phases 
- A telescope is used for observing planets 
- Venus is a kind of planet