28 April 2008 - inventions

We’ve overlooked it all along, but if you understand logic, it’s simple. Many valuable inventions can be made without creativity or hard work—they can be deduced from first principles.

burglar alarm - If you are without an extruder, there is an intruder within.
air conditioner - If a down cover can keep you warm, a coverup can keep you cool.

I offer these samples for free, because I have also deduced the secret of earning money:

Just as dough, via some anonymous Doe, makes bread, money makes money. That what your dear is for.