A man and his child on the sidewalk are not necessarily going for ice cream.
This justifies what answer for what question? Q & A: 
Premise: "Man walking down sidewalk outside carrying a small child in a strange fashion."
Hypothesis: "A man and a child on a sidewalk going to get ice cream."
Is the hypothesis entailed by the premise?
Options:
- yes
- it is not possible to tell
- no
it is not possible to tell