おもちゃのような小さな問題は解くことができても、実用サイズの問題となると 複雑すぎて、解が得られないことがあります。
But not every phenomenon encounterd in dealing with small models can be usefully scaled up. Looking at the relative thickness of the legs of an ant and an elephant remainds us that physical structures do not always scale linearly: an ant magnified a thousand times would collapse under its own weight. --Minsky and Papert(1988年版p.262)より--