Broadly broadly, there are two ways of thinking about things. First of all, there’s the classic way. Call it the Platonic style – an infinity of absolute abstract forms, all very different from each other and none defined except by the examples which represent them. In direct contrast to this, there is mathematics. Formal, precise and unambiguous definitions of simple things using simple rules. Then a dizzying array of combinations and the emergent properties which drive Stephen Wolfram wild. Call this by what Platonically exemplifies it best: the silicon style. But wait a moment! What on Earth does this rather obscure philosophising have to do with teaching technology?