  Leśniewski saves appearances, which are that some existential propositions are true and others are false, by proposing a normative schema that propositions should fulfill to be proper expressions of the thought intended. Every proposition is to represent the possessing by the object(s) denoted by the subject of the properties connoted by the predicate. Sentences which fail to conform to this norm are improper or inadequate, and should be replaced by proper alternatives. For example ‘People exist’, which is true but is intended to be synthetic, should be expressed as ‘Some beings are people’, while ‘A square circle does not exist’ should be expressed by ‘No being is a square circle’. Here is a table of some of the equivalences: