Phonics — the code beneath reading

English is a cipher with a catch: 26 letters carry ~44 phonemes (24 consonant + 20 vowel sounds, sealed 24+20=44) spelled ~250 ways, ~4.7 bits per letter (log2 26). The whole difficulty is the vowels — 5 vowel letters spell ~20 sounds, a 4x overload (20/5=4, sealed): why 'a' in cat/car/care/about defeats a guesser and rewards a decoder (https://narrowhighway.com/s/c49b8d62c76b355bdb0ed754d361e04aec01a9952e17a6bced53fc9151e3e9fc). The equation that ended the reading wars is the Simple View of Reading (Gough & Tunmer 1986): Reading = Decoding x Language-comprehension — a PRODUCT, not a sum. Both strong, 0.9x0.9 = 0.81; but a child with ZERO decoding and full spoken comprehension reads at 0x0.9 = 0, sealed. The whole-language error — that reading is decoding PLUS comprehension — sealed BROKEN (https://narrowhighway.com/s/59ab81828ca62287fc669ba15fd3a0fb6bba861f05c62deef4626433ced5457c): if it were a sum, that same child would 'read' at 0.9. It is a product; if decoding is zero, reading is zero, no matter how bright the child. That single fact is why systematic phonics won the science (National Reading Panel, 2000) — and it is the ground the K-3 reading tutor stands on. Signpost: the Word is meant to be decoded AND understood, both, multiplied.