In general, predicting what code does can be as hard as executing the code. But I know that's been considered and I guess that gets into other areas.
Even if that's the case, when dealing with AI we more easily have the option of simulation. You can run a program over and over again, and see how it reacts to different inputs.
Previous Open Thread: http://lesswrong.com/r/discussion/lw/k9x/open_thread_may_26_june_1_2014/
(oops, we missed a day!)
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one.
3. Open Threads should start on Monday, and end on Sunday.
4. Open Threads should be posted in Discussion, and not Main.