So long as you're making an honest effort, and actually working, there's no shame in stopping if it appears to you that your effort will not be rewarded. Witten

So long as you're making an honest effort, and actually working, there's no shame in stopping if it appears to you that your effort will not be rewarded. Witten, from that summary, spent at least a semester on all of his failed endeavors, and if three months is too hasty, we humans may be too short-lived to be properly deliberative.