Not really, unless you consider that it's also interesting that you have a gender-sensitive set of human singular pronoun, but not in plural:gengo said:It's interesting that we have a gender-neutral and non-human pronoun for singular nouns, but not for plural nouns, in which case we use the same pronouns that we use for humans.
I don't think the above "it" has anything to do with failure to know whether a given person is male or female. Suppose you and I invite several male friends to dinner. The above conversation would be equally natural:With regard to gender, I agree with the others that when talking about pets, 'it' should only refer to an animal whose gender is unknown to the speaker/writer. However the same is true for babies and indeed adult humans!
Who is coming?
I don't know - I can't see who it is.
Is it a man or a woman?
I can't tell.