Originally posted by: CaptainSpark
How do we know he was not informed? On one hand we are claiming that he has a network of spies and he knew about everything going on and one of the reasoning is why he didn't help Pandavas. Now on other hand we are saying he did not know about niyog of Pandu. This is contradicting. Also Bhishma is not stupid, he would know very well Pandu is impotent. These boons and curses are to fool common people as for them Royal lineage and kings are representatives of God on Earth. Bhishma doesn't need to believe in all this hogwash IMO. So obviously if he can know about everything from Kunti's son to other things he not knowing about niyog is strange.
I have said things in reply to other points in my other posts about Karna birth as well.
Also, coming to his vow - he said -
Vaisampayana continued, 'O thou of Bharata's race, Devavrata, having heard these words, and moved by the desire of benefiting his father thus answered in the hearing of the assembled chiefs, 'O foremost of truthful men, listen to the vow I utter! The man has not been or will not be born, who will have the courage to take such a vow! I shall accomplish all that thou demandest! The son that may be born of this maiden shall be our king.'
Technically, taking this for word, Satya's dad's fear was Satya's sons won't be King and Bhishma's sons won't let Satya's grandchildren be kings. Tbh, Satya's sons did inherit the throne and become kings ie her two proper legitimate sons with Shantanu. If we are taking the vow word by word Bhishma did keep his word. There is no mention of him having to work hard to continue that Satya's lineage continue to inherit the throne. For that, he decided not to marry and follow Brahmacharya.
Just like no mention of him being loyal to throne of HP, there is no mention of him having to work to make sure satya's lineage continue to get the throne. Her sons did become king and then died and Bhishma's sons never existed. So he did keep his vow and he didn't have to check to it that Satyas lineage that too from a premarital sexual hospitality relationship had to endure.
Honestly speaking both Kurti and Satya faced same thing. One side he is working to make lineage of satya's illegitimate son gets throne while he is against Kunti's same case is not viable