A boy grinds a ledge on his skateboard.
A boy is skateboarding.
If "A boy grinds a ledge on his skateboard.", can we conclude "A boy is skateboarding."?

Options: 

 - yes

 - it is not possible to tell

 - no
yes
If "A boy grinds a ledge on his skateboard.", can we conclude "A boy is skateboarding."?

Options: 

 - yes

 - it is not possible to tell

 - no
user
yes
assistant