Not-so-impossible questions.
CJackson95 said:
Infinite + Infinite = ???
Infinity + Infinity = Infinity. If you have a larger scale of infinity, the larger one takes precedence, say Aleph0 + Aleph1 = Aleph1. Same is true with all arithmetic functions.
Pandalisk said:
Answer with certainty?
What happens after death?
On the presumtion reality is as it appears, then death = oblivion. Considering the many-worlds interpretation [http://en.wikipedia.org/wiki/Many-worlds_interpretation], consciousness continues down all paths by which it can, so you (the observer) continue to live until all possibilities that rule out death are exhausted. Then oblivion.
But reality may not be as it appears, but only simulated [http://en.wikipedia.org/wiki/Simulated_reality], in which case the interpretation of reality in which you (the observer) died is rejected for one in which your existance continues (since you continue to exist so long as you can think and perceive). That is, of course, so long as you are sustained by by simulation (assuming you are intrinsic to it) or by whatever system keeps you alive (if you are extrinsic to the simulation).
AvsJoe said:
What would happen if an unstoppable force met an indestructible wall?
In reality, absolutes do not exist, hence the force is only finitely unstoppable and the wall is only finitely indestructable. In short, one would fail, much like the unsinkable Titanic.
Private Custard said:
If a fly is flying down the railway line and happens to meet the windscreen of a train travelling in the opposite direction, does the fly stop before going back in the same direction as the train, even for a nanosecond? ... But if the train is moving in that direction, how could the fly stop before going the other way?
The fly would experience rapid decelleration, ergo would slow, then stop, then reverse direction (and rapidly accellerate) to the speed of the train windshield. So yes, there is a point in time, no matter how miniscule, in which the fly stops. Of course, this is all going to be very hard on the integral structure of the poor fly.
Stabby McRunfast said:
How do blind people know when they're done wiping?
By feel and by smell. Fortunately, unlike grease, fecal matter washes off fairly easily. Much of the world prefers use of a bedet [http://en.wikipedia.org/wiki/Bedet] over bathroom tissue, anyway.
Paperless toilets are particularly big in Japan.