except there are other formulations that can achieve that result, and "knocking" was not really the primary driver in the first place -- its a con. see "The Se

except there are other formulations that can achieve that result, and "knocking" was not really the primary driver in the first place -- its a con. see "The Secret History of Lead" https://www.thenation.com/article/archive/secret-history-lead/ https://www.thenation.com/article/archive/secret-history-lea...