[There are] three things [that the disciples] stated before R' Akiva, two [of the things they said] in the name of R' Eliezer and one [of them they said] in the name of R' Yehoshua. The two [things they said] in the name of R' Eliezer [were]: A woman may go out with a “city of gold” [on the Sabbath]; and pigeon-fliers are unfit for testimony.  And [the] one [thing said to R' Akiva] in the name of R' Yehoshua [was]: [If] a sheretz [was] in the mouth of a weasel and [the weasel] was walking over [some] loaves of terumah [so that there is a] doubt whether [the sheretz] touched [the terumah or] did not touch [it], the doubt is [ruled] tahor.