טו וקשיא לן מחשבה למה לי תעשה חתיכה שלו מחשבה ואר"ל בחותכו לכלב ומחשבה לכלב לאו מחשבה היא
15 - This ruling relates to the annulment of existing uncleanness, [the argument being,] since it was at one time fit for man its uncleanness does not depart unless it has become unfit for a dog; that other instance, however, relates to the state in which it can receive uncleanness; [we therefore say,] if it is fit for man it is fit for a dog; if it i for a man it is unfit for a dog. It states, at all events, that [with flesh of man] intention is required; thoug intention is essential only for light uncleanness!<span class="x" onmousemove="('comment',' We thus learn that also the flesh of man is capable of light uncleanness, contrary to the above conclusion.');"><sup>24</sup></span> - This is so [while the man is] alive, but after death there is indeed weighty uncleanness only.<span class="x" onmousemove="('comment',' The discussion above relates, therefore, to the flesh of a dead man, when no light uncleanness is possible.');"><sup>25</sup></span> But, then, the corresponding dictum relating to cattle must, accordingly, also refer to the time after death. Now, if the flesh is meant, it surely conveys weighty uncleanness; if the blood, it too conveys weighty uncleanness,<span class="x" onmousemove="('comment',' Thus cattle, too, are subject to weighty uncleanness only.');"><sup>26</sup></span>