but what if he made no decision to operate just because he "didn't know". He madea decision to go ahead and make a life decision (to operate) even though the did not know 100%. That is exactly the type of reasoning I am saying is responsible. You might not have been convinced 100% for that last "leap of faith" that you all claim stands between all the info and G-d. However, when it comes to life decisions, we need sometimes to go beyond the "i don't know" to what is the best outcome/most probable, etc. The doctor must have known (even though he wasn't sure) that there was probability you would make it through or he wouldn't responsibly make that "leap of faith" in operating on that heart.