Welcome to the second open thread on the Effective Altruism Forum. This is our place to discuss relevant topics that have not appeared in recent posts. Thanks to an upgrade by Trike Apps, each time you visit the open thread, new comments will now be highlighted!
I had difficulty wrapping my head around the latter two when I first heard of them, and I am one who doesn't understand the idea of 'net present value' (yet). I am a data point that Larks is right; please update in the direction of caring about these things more.