Question: Rabeinu Shimshon asks from the Gemara in 'Tamid Nishchat (58;), which states that the Musaf was brought in the sixth hour, and the Bazichin, in the seventh?

Suggested Answer: And if you want to say that that is for a Mitzvah (Lechatchilah), but that Bedi'eved, the time for Musaf is all day ...

Refutation: In Temurah (Daf 14) the Gemara implies that the Musaf was Shechted and burned together with the Korban Tamid?

Answer: The Gemara there is speaking about Shabbos.

Halachah: We can learn from here that one should be careful on Yom Kipur to conclude Shachris before six and a half hours (which is the time that Tefilas Minchah falls due) ...

Reason: Because otherwise, one will have to Daven Minchah first (before Musaf).

Refutation: The Ri however, maintains that this is not necessary ...

Reason: Because when the Gemara says that one should Daven Minchah first, it speaks about somebody who has something important to do, that will prevent him from Davening Minchah in its time, and who therefore is forced to Daven both Tefilos at the same time ...

Case: Such as someone who has to go a large Se'udah (e.g. a wedding Se'udah) and he is afraid that it might be drawn out or that he might become drunk.

Conclusion: But someone who is able to Daven Minchah in its time after Musaf, should not give Minchah precedence, but should follow the regular order, Musaf and then Minchah.

Clarification: If the Pasuk is referring to the Yamim-Tovim, the word 'Ichur' is not applicable

Reason: Seeing as they cannot be complemented.

Clarification (cont.): It must therefore be referring to Tefilah.

Clarification: And Rebbi Yehoshua (ben Levi) holds that one must even stop eating in order to Daven Minchah.

Halachah: But it is not Halachah (See Tos, Shabbos (Daf 9: DH 'Leima').