I am editing a text in analytical philosophy, and I came across the following sentence:
Such a mechanism for a term’s designation makes it possible that the idea designated by the term be distinct from those assigned to the term.
As you can see, the clause following "that" is written in subjunctive mood. As far as I know, the subjunctive mood is used after verbs expressing a desire, a demand, a formal recommendation, or a resolve. In this clause, however, no verb of such nature can be found. That said, the sentence still sounds correct to me, and I don't think I should change it.
Can you explain which one (subjunctive or indicative mood) is grammatically correct in this clause, and why?