The gemara provides two answers to the question on the mishna of why the problematic animal is not canceled out in a group of other animals according to Rabbi Yochanan who thinks that only items that are sold exclusively by item are not canceled in a mixture? A suggestion is made regarding laws relating to probabilities – why can’t we separate one animal at a time and claim that each time it emerged from a majority of good animals? A discussion ensues regarding laws of probabilities. Rava claims that since the animal is not canceled out, if any of the animals in the mixture are brought on the altar, they do not provide atonement and a new sacrifice must be brought in its place. This assumption is also questioned.