Thanks so much for that suggestion, it's a little over my head and probably out of scope for the kind of conceptual modelling I'm doing, but I'm fasci...
Oh that is a good call! That page mentions C.I. Lewis coined a 'possibly', '?', which seems pretty good to me. It's used as a prefix rather than an in...
I would like to find a relatively unambiguous character in Unicode which some field has used to represent (optional or possible) (inclusion associatio...
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