Does anyone understand this Mishnah?
The Mishnah in Yadiyim 4:5 says writing in "Ashrit" defiles hands but writing in the "catuv Evri" (ancient Hebrew) does not defile , why and what is this ?
תַּרְגּוּם שֶׁבְּעֶזְרָא וְשֶׁבְּדָנִיֵּאל, מְטַמֵּא אֶת הַיָּדַיִם. תַּרְגּוּם שֶׁכְּתָבוֹ עִבְרִית וְעִבְרִית שֶׁכְּתָבוֹ תַּרְגּוּם, וּכְתָב עִבְרִי, אֵינוֹ מְטַמֵּא אֶת הַיָּדַיִם. לְעוֹלָם אֵינוֹ מְטַמֵּא, עַד שֶׁיִּכְתְּבֶנּוּ אַשּׁוּרִית, עַל הָעוֹר, וּבִדְיוֹ: The Aramaic sections in Ezra and Daniel defile the hands. If an Aramaic section was written in Hebrew, or a Hebrew section was written in Aramaic, or [Hebrew which was written with] Hebrew script, it does not defile the hands. It never defiles the hands until it is written in the Assyrian script, on parchment, and in ink.