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This milestone plaque wording implies that this milestone directly lead to other innovations in the field. It appears from this comment that really the work of Charles Kao more causally lead to those innovations. Perhaps the last sentence of the plaque needs revision then? Confining the plaque to the innovation at hand may be better than attributing the progression of the overall field to a specific sequence of innovations if the chain of precedence is not indisputable. This milestone may stand better recognized on its own.