Rig-amaphore
Proposition:
using a lottery draw machine similar to that one just shown
if ALL the balls were drawn
and the order of numbers were noted down
and the balls were reloaded and drawn again
using the same procedure
if any of the first seven numbers drawn on the first draw
are identical to any of the first numbers
drawn on the second draw
then the suspicion is initiated that these identical
numbers were rigged to be drawn.
Likewise,
if any of the last seven numbers drawn on the first draw
are identical to any of the last numbers
drawn on the second draw
then the suspicion is initiated that these identical
numbers were rigged not to be drawn.
And
if this happens again on the third draw
the suspicion is aggravated
that the lottery is actually rigged.
How to check on this proposition?
The National 649 lottery admins never do.
the next succeeding draw is not presented.
However,
the Canadian Lottomax does, unwittingly.
The extra draws for that day are listed down
as extra prizes
and the same lottery machine is used (hopefully)
and the same numbers are reloaded (hopefully).
You can check.