[LEAPSECS] Consensus building?

[Gerard Ashton]

Change and add:

<s>- the solar-day is a commonly used unit of measurement</s>

<u>- TAI and parallel time scales have been defined so that in modern 
times the difference between
an atomic day and a solar day is not perceptible without the aid of 
timepieces. Popular acceptance
of atomic days as a basis of the civil calendar and the corresponding 
deprecation of the solar day
will not be truly tested until the difference between the two is 
perceptible without a timepiece.</u>

- the SI second is part of a coherent system of units and redefinition 
of the second would
   disturb the definition of most other units