The evolution of P/F vs T/K raises important questions

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One analytical element that may be related is that there are about 20 qk but no qt. If this observation is meaningful in any way, it does seem as if Jacques Guy was right to identify in his transliteration the left loop of t with a q that "just happens" to be written like q, but higher. If the loop on the left is actually a q, and qq is forbidden, there should not be any qp either. Actually there might be one on f101r1 but very rounded like a y so the unusual ligature looks more like {yp} than qp. There is a {yt} two lines below for comparison.