Assuming something is true for the sake of discussion; imagining a hypothetical situation.
From Old French 'supposer,' combining 'sub-' (under) and 'poser' (to place). Originally meant to place under or substitute. Over time it evolved to mean 'assume' or 'presume,' and the '-ing' form creates a conjunction for conditional thinking.
Supposing is how we play with ideas—it's the word of hypothesis, science experiments, and philosophical 'what-ifs.' Every scientist and inventor uses 'supposing' to explore possibilities before testing them.
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