Leo: Premise: "The black dog is sniffing the brown dog's butt."
Hypothesis: "Two dogs meet each other for the first time."
Do we know that the hypothesis entailed by the premise?
Mei: OK, So, let's think first...
Me:
The fact that black dog is sniffing the brown dog's butt doesn't imply dogs meet each other for the first time.
Thus, the answer is it is not possible to tell.