iv come across this before. It did the same thing when i asked it about the Rupes Nigra and also when i was asking it about flagellants.

Im pretty sure this happens when there is conflicting conclusion or opinions on the subject. This program cant decide what is actually right when presented with opposing viewpoints.

whenever it give you an answer like that ask it to "elaborate on the controversial nature of the subject." and you might get more out of it.