Michael Everson wrote:

> No, they [katakana and hiragana] are two different syllabaries. The have
> the same structure, different glyphs, and are not interchangeable. Texts
> can be written in either for specific effects. They're two scripts.

Let's make the following three substitutions in your passage above:

- "katakana" -> "lowercase letters"
- "hiragana" -> "uppercase letters"
- "syllabaries" -> "alphabets"

We have just asserted that English is written with two different alphabetic
scripts.

Deny this, and you deny your assertion above; defend that, and you are also
saying that English uses two alphabets.

_ Marco