There are [laws] that apply to the white hair that do not apply to the spreading, while others apply to the spreading and do not apply to the white hair. That white hair causes uncleanness at the beginning, it causes uncleanness whatever the state of its whiteness, and it is never a sign of cleanness. There are laws that apply to the spreading, for the spreading causes uncleanness however small its extent, it causes uncleanness for all negaim and even when it is outside the nega, and these laws do not apply to the white hair.

There are [laws] that apply to the quick flesh that do not apply to the spreading, while other restrictions apply to the spreading and do not apply to the quick flesh. That quick flesh causes uncleanness at the beginning, it causes uncleanness whatever its color, and it is never a sign of cleanness. There are [laws] that apply to the spreading, for the spreading causes uncleanness however small its extent, it causes uncleanness in all forms of negaim and also where it is outside the leprosy sign, and these laws do not apply to the quick flesh.

There are [laws] that apply to white hair that do not apply to quick flesh, while others apply to quick flesh and not to white hair. White hair causes uncleanness in a boil and in a burn, whether growing together or dispersed, and whether encompassed or unencompassed. There are [laws] that apply to quick flesh, for quick flesh causes uncleanness in scalp baldness and in forehead baldness, whether it was turned or was not turned, it prevents the cleanness of one who is turned all white, and causes uncleanness whatever its color, and these do not apply to white hair.

If the two hairs were black at the root and white at the tip he is clean. If they were white at the root and black at the tip he is unclean. How much whiteness must there be? Rabbi Meir says: any amount. Rabbi Shimon says: enough to be cut with a pair of scissors. If it was single at the root but split at the tip, and it looks like two hairs, he is clean. If a bright spot had [two] white hairs or black hair he is unclean, for we are not concerned that the place of the black hair lessened the space of the bright spot, since the former is of no consequence.

If a bright spot the size of a split bean had within it quick flesh the size of a lentil and there was white hair within the quick flesh: if the quick flesh disappeared the spot is unclean on account of the white hair; if the white hair disappeared it is unclean on account of the quick flesh. Rabbi Shimon makes it clean, since it was not the bright spot that caused it [the hair] to turn [white]. If a bright spot together with the quick flesh in it was of the size of a split bean and there was white hair within the spot: if the quick flesh disappeared the bright spot is unclean on account of the white hair; if the white hair disappeared it is unclean on account of the quick flesh. Rabbi Shimon says that it is clean, since it was not a bright spot the size of a split bean that caused the hair to turn [white]. He agrees that if where the white hair was, was the size of a split bean, that it is impure.

A bright spot which had quick flesh and a spreading: if the quick flesh disappeared it is unclean on account of the spreading; if the spreading disappeared it is unclean on account of the quick flesh. So also in the case of white hair and a spreading. If it [the bright spot] disappeared and appeared again at the end of the week, it is regarded as though it had remained as it was. If it reappeared after it had been pronounced clean, it must be inspected as a new one. If it had been bright white but was now dull white, or if it had been dull white but was now bright white, it is regarded as though it had remained as it was, provided that it does not become less white than the four principal colors. If it contracted and then spread, or if it spread and then contracted: Rabbi Akiva rules that it is unclean; But the sages rule that it is clean.

A bright spot the size of a split bean, and it spreads to the extent of half a split bean, while of the original spot there disappeared as much as half a split bean: Rabbi Akiba says: it must be inspected as a new one, But the sages say: it is clean.

A bright spot the size of a split bean that spread to the extent of half a split bean and a little more, while as much as half the size of a split bean disappeared from the original spot: Rabbi Akiva says that it is unclean, But the sages say that it is clean. A bright spot the size of a split bean that spread to the extent of a split bean and a little more, while the original spot disappeared: Rabbi Akiva says that is it unclean, But the sages say: it should be inspected as a new one.

A bright spot the size of a split bean spread to the extent of a split bean, and in the spreading there appeared quick flesh or white hair, while the original spot disappeared: Rabbi Akiva says: it is unclean. But the sages say: it must be inspected as a new one. A bright spot the size of half a split bean with nothing in it, and then there appeared a bright spot the size of half a split bean and with one hair, this is to be isolated. A bright spot the size of half a split bean with one hair and then there appeared another spot of the size of a half a split bean with one hair, this is to be isolated. A bright spot the size of half a split bean with two hairs and another spot of the size of half a split bean appeared with one hair, this is to be isolated.

A bright spot the size of a split bean and there was nothing else, and then there appeared a bright spot of the size of half a split bean having two hairs, this one is declared unclean. Because they said: if the bright spot preceded the white hair he is unclean; if the white hair preceded the bright spot he is clean; and if it is doubtful he is unclean. Rabbi Joshua regards this as unsolvable.