Quote:
Originally posted by MattyX:
It can move forward, though, and increase its airspeed enough to attain lift, no matter what the conveyor does.

::edited for grammar::
Right. But it can't move forward. Not if the conveyor is matching *exactly* the speed.
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"Nature has constituted utility to man the standard and test of virtue. Men living in different countries, under different circumstances, different habits and regimens, may have different utilities; the same act, therefore, may be useful and consequently virtuous in one country which is injurious and vicious in another differently circumstanced" - Thomas Jefferson, moral relativist