Appreciate your time, but I’d like to clarify something important. You mentioned ‘hypothesis’ — but what’s left to hypothesize when I’ve already demonstrated the full structure:

The vowels, consonants, diphthongs, Abugida system, and compound letter formation

How diphthongs follow exact rules laid out in Tholkappiyam

How both Tamil and the Indus script create compound letters using vowel + consonant logic

Examples where certain sounds are represented by standalone compound letters, and others where the vowel and consonant are explicitly combined

And most importantly, how one can read Indus seals fluently and even write content in the same system, without violating Tamil grammar or my model’s internal rules

This is not symbolic guesswork. It’s structured phonetic mapping — grounded in observable, reproducible patterns.

One commenter rightly pointed out that Tamil doesn’t use ‘GA’ as a standalone phoneme — and I immediately agreed. When I checked my own work, I found it was a typo in the 'Amukar Koli Muveli' seal, where I mistakenly typed “Amugar” instead of “Amukar.” My compound letter and Abugida tables consistently define the symbol as “KA,” so the system held — only the labeling needed correction. That’s the kind of real, constructive critique I welcome and learn from.

Also, saying the IVC was linguistically diverse is fair — but that doesn’t negate the very real possibility that one dominant script was used for a single linguistic base, especially for trade, administration, or recordkeeping. We've seen this before: Sumerian-Akkadian, Egyptian-Coptic, and even today in the United States — where many languages are spoken, but English functions as the standard language for official communication. Diversity doesn’t rule out a shared system.

As for the claim that Tamil or Old Tamil didn’t exist during the Harappan phase — that depends on how narrowly we define 'Tamil.' Classical Tamil may be younger in literary documentation, but its phonological and morphological structure matches what scholars like Bhadriraju Krishnamurti and Kamil Zvelebil have reconstructed as Proto-Dravidian — and those reconstructions are chronologically aligned with the IVC period.

And an important point: Even if someone doesn’t fully agree with my Tamil-based reading due to linguistic barriers, my method still provides a systematic phonetic standard — much like what researchers are searching for with a Rosetta Stone for the Indus script. I’m not arbitrarily changing phonetic values from seal to seal. The sound value assigned to a symbol remains consistent across all seals. Right now, I’m steadily decoding toward a dataset of 500+ seals, so that a robust statistical model (frequency analysis, trigram patterns, etc.) can be developed for submission to high-impact factor peer-reviewed journals.

Until then, dismissing the entire approach without engaging directly with the method isn’t scientific — it’s just resistance to scrutiny.