Note: I accidentally blew away all of the content of this post, so forgive me if it's suddenly much different than it used to be.
On Day 16, we've got some example inputs and outputs to machine instructions in our time machine and we need to figure out which opcodes do which things.
There were a few challenges similar to this in years past. Let's see how everybody likes this one.
One of the most consolidated misconceptions about programming, since the early days, is the idea that such activity is purely technical, completely exact in nature, like Math and Physics. Computation is exact, but programming is not.