Gene Mechtly wrote: Terry at [EMAIL PROTECTED] wrote: >>I read: >>"the International System of Units (SI), which is the modern form of the >>metric system." > >True, Terry, but clearly there must have been older (less modern) forms >of the metric system comprised of metric units, e.g. the system of cgs >units, esu, emu, or Gaussian units.
Yes. I understand that there were old systems that were metric and there is the modern metric system that is metric. My clients are only interested in complying with the current version. >>and I conclude: > >>1. SI unit = unit of the modern form of the metric system > >Agreed. > >>2. Non-SI unit = not a unit of the modern form of the metric system > > Agreed. Thank you for 2 direct answers to 2 direct questions. I am pleased that I got to this point finally. >But, Terry, neither 1. nor 2. exclude non-SI units as metric units >in older groups of less modern metric units! I agree! >>Does the statement: >>"...the International System of Units (SI), which is the modern >>form of the metric system." >> >>mean that: >> >>[modern form of the metric system] = [SI]? > >Yes, Terry. I agree with your above statement as an >*identity* not merely as an equality. i.e. true in either >direction. Thank you.
