The kind of judgements the issues raised in the conversation would be best described as...:
- conjectures.
Since Ali and James are talking about something abstract and subjective- the meaning and nature of love- all they can do is come up with guesswork, because all they can truly rely on is their own feelings and impressions, and not everybody's. In other words, any evidence they might come up with will be incomplete and inconclusive. That is what we call making a conjecture about something.