Imagine that the gods and goddesses, our divine parents prove to be imminently practical in the way they have created us, and intended our structure (structural design) to teach what we need to know. This would yield to the study of human anatomy a kind of special status. For instance, suppose we were to note that our teeth are symmetical in several ways, that each of us (male and female) bear 32 teeth, and this means that the minimum required for ordinary discourse (communication) is 64. Now let us add to our equation that many of the sounds we make (morphemes) that we form involve the use of our teeth.
Imagine that the number of letters in our grasp of the ideal alphabet has been handed to us, and that it stands at 64, the same number as the letters in the DNA “alphabet.” That is, if you add the number of teeth found in one male and one female adult — 2 forms the complementary minimum for the production of human life (DNA recombination) — we would have 64. The only letter we have in our alphabet that is formed in a part of the body not from the mouth or throat is the letter “N” in English. Coincidentally, this “wrongful” (unfitting) letter leads the words in English most often indicating no-reference — No, not, never, negative, negation, the prefix “non-“, none, neither, etc.
In short, I believe that so far, the ideal language forms eight sets of 8 letters that are symmetrical. This follows the pattern of our teeth (and the language of DNA). Whether these letters should show as (two-fold) diphthongs (that is, as two letters that combine to make one sound, like “ph” in “philadelphia” makes the sound of the letter “f”), I remain unsure. As far as I know, the Russian tongue has 33 letters, and is the only one that approximates 32.
The letters should bear (be composed of) straight lines only (these resolve most easily to the reading eye and create greater clarity), and each should receive careful scrutiny as to it symbolic meaning. The alphabet should use only majuscules (capital letters, not lower case) that can reduce a little in size for the sake of economy — more letters per page.