"Historical kana usage", a prescriptive method of using kana to write Japanese. Devised in the Edo period by Keichū (契沖) and taught in schools until 1946, it aims to be etymologically faithful and reflects earlier stages of the language (Heian period and earlier).

revisionism

two persons / a couple, pair / (poetic) the two of us, we two

two-story / two-storied

you, thou / this, that / only

Kyūjitai form of 正十二面体: regular dodecahedron

Kyūjitai form of 正二十面体: regular icosahedron

By teaching, we learn. Docendo discimus.

to each his own; different strokes for different folks; there's no accounting for taste

Synonym of 十人十色 (jūnin toiro, “there's no accounting for taste”)