Is the premise "A person is skiing in the water." true if "A person is snow skiing."?
no
Is the premise "A group of happy young men and women hold flags with Chinese writing on them." true if "The people are Chinese."?
it is not possible to tell
Is the premise "A construction site with a worker in a green bandanna sitting down as he works on something." true if "A man is holding something."?
yes
Is the premise "A person jumping step railing." true if "There is railing on the stops."?
yes