Post number 2 was by someone else - Ouderkirk.
Your latter statement seems to display some lack of knowledge of science.As far as weights and measures go, uncertainty plagues them more frequently than other scientific disciplines due to the necessity of common use. US law comes to bear here, since it is the job of Congress alone in the USA to assign weights and measures; this cannot “cross borders” but by definition has to stay within US borders. Any “international standard” that purports to be such is a political animal rather than scientific.
Your statement reflects a complete ignorance of science. The weights and measurements have been rigidly defined and are set by the CGPM and maintained by the BIPM, the international bureau of weights and measures. This is to remove uncertainty of common use as you put it. The result being that a dose of 1 mg of atropine or 0.3 mg/kg of etomidate is immediately understood and is the same amount no matter where the medication is delivered, be it the US, China, or Trinidad and Tobago. Someone picking up a chemistry journal in India can replicate results published in Brazil.
Because the measurements and terms mean the same thing.
As to Congress setting weights and measures, guess what. Congress adopted the metric system stating that "It shall be lawful throughout the United States of America to employ the weights and measures of the metric system; and no contract or dealing, or pleading in any court, shall be deemed invalid or liable to objection because the weights or measures expressed or referred to therein are weights or measures of the metric system."
The Treaty of the Meter was signed by the US in 1875 establishing the BIPM.
In 1893, the Madenhall order was given by the Treasury Dept., Weights and Measures, that the SI units would be the standard of measurement for the US and defined the common English units in SI.
The NIST, established by Congress to maintain standards of weights and measurement adopted SI units in 1964 for all industry and commerce.
In 1988, Congress passed the Omnibus Trade and Competitiveness Act which stated in part that "the metric system of measurement as the preferred system of weights and measures for United States trade and commerce."
Thus, an international system designed to standardize measurements so that all science research and applications can be understood despite language differences has been officially embraced by the US for trade and commerce for close to 140 years and with good reason.
But you can still buy your bananas by the pound.
I stand corrected. (How did I get you two mixed up?)
As for “ignorance of science”, the scientific fact is that all measurements are wrong. Uncertainty can never be removed at any time, unless we get standards straight from God. (Foretold in Ezekiel 45:12 that we’ll return to the shekel, with the twenty-gerah division, incidentally.)