Is it more demanding than asking them to memorize a collection of (mostly arbitrary) ascii symbols and digraphs? If you learn apl, you have to remember that gr

Is it more demanding than asking them to memorize a collection of (mostly arbitrary) ascii symbols and digraphs? If you learn apl, you have to remember that grade up is ⍋ (s-S-4); if you learn j, you have to remember that grade up is /:. The primary barrier to entry is remembering what operations you can do and how you can do them, not how to type them.