1. having its source in or being guided by the intellect (distinguished from experience or emotion)
2. consistent with or based on or using reason
3. of or associated with or requiring the use of the mind
4. tending to maximize expected utility given beliefs
altruistic (adj.): showing unselfish concern for the welfare of others
Is open source rational? Is it altruistic?
Please discuss. (If you are using the last definition: with respect to what utility function is it rational or irrational?)