I just declined an invitation to participate in an "interdisciplinary" conference. I did so because I vowed to myself some years ago never to bother with anything describing itself as "interdisciplinary." This vow was brought on by an exhausting exchange I had at such a conference. During the Q&A, an audience member posed a question to me that was objectively incoherent-- a string of words with a vocal inflection at the end. In the posing of this question, the audience member repeatedly used the word "theory" and the word "metaphysics" interchangeably. In trying to respond to the (alleged) question, I began by noting, "You seem to treat the words 'metaphysics' and 'theory' as synonyms." The audience member interrupted at this point, saying "No I don't." So I replied, "Well, you use them interchangeably." With a tone of confident vindication, the audience member responded, "Yes... I do." My response that interchangeability is at least a symptom of synonymy, if not a criterion for it, was met with a blank, but nevertheless confident, stare.
I later discovered that this audience member was a very distinguished professor of English. I concluded that "interdisciplinary" simply means something like people with no philosophical training bullshitting about philosophy.