Speculations as to why Poincar didnt contest priority   I copy and paste from above  Cleonis please specify since you lost me here Where two or three people propose the same theory at appriximately the same time there is commonly a debate about priority of parts andor the whole but not about rediscovery    Ah I see then you and I had something different in mind  About priority as is stated in the article Poincar did not contest priority  As to the why my personal impression given the information available to me and I dont have all the information my personal impression is that Poincar judged that Einstein was prematurely confident  I figure that as seen from a  perspective if it would turn out that it would be impossible to formulate a Lorentzinvariant theory of gravitation then the approach of uncompromising implementation of the principle of relativity of inertial motion would prove to be a dead end My understanding is that in the years after  and to this day the scientific community judged that Einsteins choice of avenue to follow was the best one That would explain why Poincar didnt contest priority If he judged Einsteins uncompromising attitude as a premature commitment he wouldnt have wanted to be associated with it Anyway these considerations of mine are too speculative to be of value to the article I fear that what Im doing is not of good help to you so I will try hard to keep a low profile My intention is to support you