Reference for Bava Batra 185:8
אמר לך רב אנא דאמרי אפילו לתנא קמא עד כאן לא קאמר תנא קמא התם אלא דלא אזלינן בתר חזקה אבל בתר רובא אזלינן
differ on the same principles] as the [following] Tannaim? [It has been taught:] [If] an ox was grazing and a dead ox was found at its side, it must not be said, although the one is gored and the other is wont to gore, one bitten and the other wont to bite, 'It is obvious that the one gored or bit the other'. R. Aha said: [In the case of] a camel which 'covers'<span class="x" onmousemove="('comment',' A euphemism. Lit., 'to be behind'. At the time of mating it is ferocious, and is likely to attack other males with fatal results. ');"><sup>14</sup></span> among [other] camels, and a dead camel was found at its side, it is obvious that the one killed the other. Now, assuming that [the principles] of majority<span class="x" onmousemove="('comment',' Most animals do not gore. therefore every animal must be regarded as innocuous until the contrary has been proved. ');"><sup>15</sup></span>