A proposition may be universal or particular, and it may be affirmative or negative.
From the en.wikipedia.org
He may reason that defeat is a universal experience, that life itself is a losing proposition.
From the time.com
There is a proposition of a universal communal voice in judgements of taste, which calls for a shared feeling among the others.
From the en.wikipedia.org
Universal health insurance is an expensive proposition, with subsidies for the working poor costing $100 billion a year or more.
From the latimes.com
Succession has developed a universal blueprint for businesses within the sector, aimed at creating an attractive investment proposition for blue chip clients.