Pesachim 11: Gaps in Time

The previous daf focuses on the time for Bedikat Chametz. On this daf, we delve into some of the rationale underlying the timing, with an eye to making sure that the rabbis' views are consistent across topics. Which, itself, is an interesting premise. Also - the discussion of what hour in the day (sha'ot zemaniot) to finish eating and then burning chametz. With an unidentified (thus far) hour between the two end times. Plus: A new dispute between R. Yehudah and R. Meir. Namely, when two witnesses essentially corroborate their respective stories, but with key details in error - is that testimony upheld? How much leeway do we allow when it comes to errors in time?