game flow, recent history, your image, how he expects you view his line (i.e. does he think you think this will look fos etc. or does he think you think theres no way he could ever bluff here) are all important... kinda hard to tell you whether to call down or fold really. I think you understand all these things well so there's not much in thread aside from figuring out who on this forum likes to fold without any idea regarding the list of factors I provided.