It was known to the schoolmen,(19) that, as the syllogism requires two premises, no science can proceed from a single first principle which cannot be the subject of further deduction, but must have several, at least two.
Eskolastikoek jadanik ezaguna zuten, silogismoak bi premisa eskatzen dituelarik, ezin dela proposizio bakarretik, aurreko beste batetik deduzitzen denetik, ezein zientzia sortu, baizik eta gehiago, gutxienez bi izan behar dituela.