Wacek,  (01)
Your note reminds me of the story about four professors who
were traveling from England to Scotland by train.  (02)
As they crossed the border, they saw a flock of black sheep
on a hillside. Whereupon, the English professor exclaimed
"Look, all the sheep in Scotland are black."  (03)
"No," replied the history professor, "the most you can claim
is that some of the sheep in Scotland are black."  (04)
The mathematics professor replied "No, the most you can claim
is that some of the sheep in Scotland are black on at least
one side."  (05)
Finally, the logic professor said "No, the most you can claim
is that at least some of the sheep in Scotland are black on at
least one side at least part of the time."  (06)
John  (07)
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