Britain, today, educates 4.8 million primary school children in Britain. And we educate five million primary school children around the developing world, at a cost of 2.5 per cent of what we spend on British children. ↗
Cary Grant never won an Oscar, primarily, I suspect, because he made everything look so effortless. Why reward someone for having fun, for being charming? ↗
I would hazard a guess that we have found fossilized human remains of at least a thousand different specimens in South and East Africa, more or less complete at that. I think this is where the prelude to human history was primarily played out. ↗
Finally there are simple ideas of which no definition can be given; there are also axioms or postulates, or in a word primary principles, which cannot be proved and have no need of proof. ↗