Look into every sub field of philosophy and the debates that have gone on about certain topics for thousands of years.
For example, the mind-body problem in epistemology.
To clarify, no the field is not based on social consensus but logic. How do we explain certain things? For example, Kant believed that logic as a field had been "solved" in the sense there needs no more progress in the field as the techniques developed were sufficient to solve logic problems. Until Godel came along and improved on logic in the 20th century. Solving in this sense is a technical definition not the social one.
To clarify, no the field is not based on social consensus but logic. How do we explain certain things? For example, Kant believed that logic as a field had been "solved" in the sense there needs no more progress in the field as the techniques developed were sufficient to solve logic problems. Until Godel came along and improved on logic in the 20th century. Solving in this sense is a technical definition not the social one.