Premise: "A lady with a purple mohawk and red sleeveless shirt pointing and laughing."
Hypothesis: "A fat lady with a purple mohawk and red sleeveless shirt pointing and laughing."
Do we know that the hypothesis entailed by the premise? Now, let's be accurate as possible. Some thinking first:
A lady with a purple mohawk and red sleeveless shirt pointing and laughing does not imply the lady is fat. So, the answer is it is not possible to tell.