A kind of fun question.



Suppose we have 2 one-meter spheres of materials: one of which
contains points of matter, the other of anti-matter. The
"physics" of the 2 spheres are:

1) none of the spheres has a surface! (I.e., all the material
points are interior points.)

2) if any point of 1 sphere comes in contact with any point
of the other sphere, both spheres will instantaneously explode
into non-existence.

Suppose further, at time t0, both spheres' centres are at a 10-meter
distance from each other and begin a constant speed of 1m/sec toward
each other. The questions are:

Q1: What happen to the existences of both spheres at t = t0 + 10 sec?

Q2: If at t = t0 + 10 both don't exist anymore, when did they
vanish?

--
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What we call 'I' is just a swinging door which moves
when we inhale and exhale.
Shunryu Suzuki
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