I don't know where you read that I "completely discount the value of mathematics". >"...cannot avoid accepting that correctly applied theoretical manipulations

I don't know where you read that I "completely discount the value of mathematics". >"...cannot avoid accepting that correctly applied theoretical manipulations of mathematical symbols jive perfectly well with the predicted, physical outcome they represent." Close, except for "perfectly". Mathematics and other scientific models are approximations of reality and nothing more. They are fantastic tools but don't be misled into thinking they give a "perfect" picture.