Related for Menachot 45:17
ורבי חנינא אמר כל שאפשר לו להיות כמוהו אינו בטל וכל שאי אפשר לו להיות כמוהו בטל
since slaughtered meat cannot assume the character of nebelah meat;<span class="x" onmousemove="('comment',' The latter conveys uncleanness, whilst the former does not; the mixture is therefore considered to be a mixture of different kinds (in view of the difference between them as to the law of uncleanness) , so that the one is neutralized in the other according to all views.');"><sup>18</sup></span> ritually slaughtered meat is not neutralized in nebelah meat, since nebelah meat can assume the character of slaughtered meat, for when it has putrified the uncleanness thereof has gone.<span class="x" onmousemove="('comment',' And if a morsel of ritually slaughtered meat was confused with a large quantity of nebelah meat, the whole is regarded as a mixture of like kinds and no neutralization takes place. Consequently if terumah (v. Num. XVIII, 8ff) produce were to be brought into contact with this mixture it would not be unclean of a certainty, but would always be considered to be in a state of doubtful uncleanness, since it might only have touched the morsel of slaughtered meat in the mixture. R. Hisda is of the opinion that it is the neutralizer, i.e., the substance which is in the majority in the mixture, which is to be considered; and if it is, or can become, like the substance which is about to be neutralized, the mixture is then considered to be a mixture of like kinds.');"><sup>19</sup></span>