[rmc]

You could take validating from the original 5 day week (instead of the then norm of 6 day week) which Henry Ford introduced about 100 years ago.

[benpbenp]

I don't follow. If validation of the 5 day week implies the validation of the 4 day week, then... well, I am sure you see where this is going.

[dalore]

Well the logical conclusion is a 0 day week which is obviously not going to work. There must be some sort of balance somewhere.

[eli_gottlieb]

Not really. The logical conclusion is that productivity becomes high enough to just use fewer employees.