Suppositional in a sentence as an adjective

We've all probably read this many times, but for me this is the first time I realized how incredibly suppositional the essay is.

Especially since we're talking about something so incredibly squishy and suppositional, nobody is going to be able to "prove" anything interesting in a formal capacity.

Suppositional definitions

adjective

based primarily on surmise rather than adequate evidence; "theories about the extinction of dinosaurs are still highly conjectural"; "the supposed reason for his absence"; "suppositious reconstructions of dead languages"; "hypothetical situation"

See also: conjectural divinatory hypothetical hypothetic supposed suppositious supposititious