To Ben Levi and others: I’ll try to be brief. First of all, Ben Levi, you are totally-repeat,totally- wrong in your constant refrain about bringingsome proof from the Rambam in Pirush Hamishnayos. I re-read it for the third time and you absolutely miss the point. You referred us to one small part of the lengthy section in your reference. Well, a little knowledge is a dangerous thing. Please re-read the whole section and you will see that the Rambam is not dealing at all with maamorei chazal that discuss natural science, medicine or astronomy. He is talking about matters of emunah and how to interpret Pesukim who, at first blush, don’t correspond to reality. I am not going to address this point anymore. You are just wrong in how you learn the Rambam.
As far as Rabbi Slifkin and Rabbi Meiselman. Sam2 has pretty well skewered Rabbi Meiselman’s attacks on Slifkin. You can also read a very erudite discussion on this matter right now on Slifkin’s blog (not by himself!) ,that pretty conclusively shows that aggadata is not binding on us and we do not have to accept everything that chazal say in aggadata.
Lastly, and I ask mechilah for Rabbi Meiselman if this is not true, I think that Rabbi Meiselman was on the dais some months ago at an anti-israel rally by satmar (dealing with the new draft law). To me, that disqualifies him from having any authority on my own matters of emunah.