Mishnah Taharos 5:9: If one witness says, "He has become impure," but he says, "I have not become impure," he is pure. If two [witnesses] say, "You have become impure," and he says, "I have not become impure," Rabbi Meir declares him impure; but the Sages say: he is believed regarding himself. One witness says, "He has become impure," and two [witnesses] say, "He has not become impure," whether in a private domain or in a public domain, he is pure. Two [witnesses] say, "He has become impure," and one witness says, "He has not become impure," whether in a private domain or in a public domain, he is impure. One witness says, "He has become impure," and another witness says, "He has not become impure," or if one woman says, "He has become impure," and another woman says, "He has not become impure," in a private domain he is impure, but in a public domain he is pure.

עֵד אוֹמֵר נִטְמָא, וְהוּא אוֹמֵר לֹא נִטְמֵאתִי, טָהוֹר. שְׁנַיִם אוֹמְרִים נִטְמֵאתָ, וְהוּא אוֹמֵר לֹא נִטְמֵאתִי, רַבִּי מֵאִיר מְטַמֵּא. וַחֲכָמִים אוֹמְרִים, הוּא נֶאֱמָן עַל יְדֵי עַצְמוֹ. עֵד אוֹמֵר נִטְמָא, וּשְׁנַיִם אוֹמְרִים לֹא נִטְמָא, בֵּין בִּרְשׁוּת הַיָּחִיד בֵּין בִּרְשׁוּת הָרַבִּים, טָהוֹר. שְׁנַיִם אוֹמְרִים נִטְמָא, וְעֵד אוֹמֵר לֹא נִטְמָא, בֵּין בִּרְשׁוּת הַיָּחִיד בֵּין בִּרְשׁוּת הָרַבִּים, טָמֵא. עֵד אוֹמֵר נִטְמָא וְעֵד אוֹמֵר לֹא נִטְמָא, אִשָּׁה אוֹמֶרֶת נִטְמָא וְאִשָּׁה אוֹמֶרֶת לֹא נִטְמָא, בִּרְשׁוּת הַיָּחִיד, טָמֵא. בִּרְשׁוּת הָרַבִּים, טָהוֹר:

Mishnah Taharos 6:1: A place that was a private domain, and then became a public domain, and then was turned again into a private domain: while it is a private domain its uncertainty [i.e. any cases of uncertainty regarding the purity status of something found in it] is impure; while it is a public domain its uncertainty is pure. A man who was gravely ill in a private domain, and they took him out into a public domain, and then they returned him to a private domain: while he is in the private domain his uncertainty [i.e. the uncertainty of the purity status of any person or object that came in contact with him, if it was not clear whether he was alive or dead at the time] is impure; while he is in the public domain his uncertainty is pure. Rabbi Shimon says: the public domain interrupts [i.e. and once he is in the public domain and thereby determined to be alive, we can no longer maintain that earlier, while he was in the private domain, he was dead].

מָקוֹם שֶׁהָיָה רְשׁוּת הַיָּחִיד וְנַעֲשָׂה רְשׁוּת הָרַבִּים, חָזַר וְנַעֲשָׂה רְשׁוּת הַיָּחִיד, כְּשֶׁהוּא רְשׁוּת הַיָּחִיד, סְפֵקוֹ טָמֵא. כְּשֶׁהוּא רְשׁוּת הָרַבִּים, סְפֵקוֹ טָהוֹר. הַמְסֻכָּן בִּרְשׁוּת הַיָּחִיד וְהוֹצִיאוּהוּ לִרְשׁוּת הָרַבִּים, וְהֶחֱזִירוּהוּ לִרְשׁוּת הַיָּחִיד, כְּשֶׁהוּא בִרְשׁוּת הַיָּחִיד, סְפֵקוֹ טָמֵא. כְּשֶׁהוּא בִרְשׁוּת הָרַבִּים, סְפֵקוֹ טָהוֹר. רַבִּי שִׁמְעוֹן אוֹמֵר, רְשׁוּת הָרַבִּים מַפְסָקֶת: