DaasYochid: form the questions of Sam2 and the words of HaLeivi–even though they may differ from what I said- you can see that there is plenty of questions on “maamaorei chazal” that do not deal with halacha. As I said, halacha clearly cannot be challenged- on other matters,such as medicine and science, I differ from whay you say.I am not even sure if chazal themselves suscribed to your view that all what they said was infallible. The grey areas are “hashkofo” and -at times- aggadata. On that ,you see that many rishonim differed on the gemoro’s and midrashs interpretations. (see Rabbi Avrohom ben HoRambam in this week’s parsha on Yaakov Ovinu’s struggle with the angel..).
Where do yo udraw the line at fully accepting a previous dor’s views? (not in halacha). Gemoro? Geonim? Rishonim?