Q: If "Two boys in white outfits are practicing martial arts." does that mean that "Two boys are learning karate to defend themselves."?
Options:
- yes
- it is not possible to tell
- no
A: it is not possible to tell
Explain how we arrive at this answer: 
user
Explanation: The boys could be learning another type of martial arts besides karate and they may be learning it to challenge themselves instead of learning it to defend themselves.
assistant