The ambiguity isn't in the phrasing of the father, we understand what he says about his family, it is in the probability universe that surrounds his statement.

The ambiguity isn't in the phrasing of the father, we understand what he says about his family, it is in the probability universe that surrounds his statement. The scenario doesn't give one; we don't have a model for the probability of people saying anything at all unprompted. We have a simplified model for the probability distribution of genders, and one for how prompts and replies modify an already known probability model, but here there is nothing to anchor any reasoning of this kind.