We have 1 jellybean in a jar. From hearing rumors and people talking, everyones says that they think its a red jellybean. The jellybean could be red, orange, green, blue, fushia, magenta, violet, etc. However, after research, we come to the conclusion that there is a 99.9999999% chance that the jelly bean is red. We, however, do not know for sure. Obviously a .00000001% chance exists that is, lets say, not red. We are unsure what exists in the jar. Red or not red. Why? Because both scenarios are possible no matter how big or small a chance. However the red jellybean is most probable.
If I understand your analogy correctly, then the red jellybean is ‘reality’, but our senses just give us an interpretation, one that makes us believe it is red. If the jelly bean is green and everyone sees a red one and we are all sure it’s red, that does not mean that we can’t trust our senses, because for example we see colours, which in reality don’t exist of course. Reality knows nothing of colours, only different wavelengths. But we have said that colours exist, because we see them, we’ve given a name to something which only exists in an interpretation of reality, yet in reality itself the jellybean is green and not red (the colours are wavelengths, not colours). I suppose the jellybean analogy is not a very good one, but I’ll just continue to use it anyway...
We can’t be sure what colour the jellybean really is – no – but what we can be sure of is that this perception we see of the jellybean is there. The perception ‘red’, which everyone can see exists, and we can be sure of that.
Threewood, I think we all understand what you're saying,
And since it is possible, we cannot be absolutely sure that we are on earth. Why? Lets call the earth scenario a red jellybean and the black hole scenario a green jellybean. We are unsure which jellybean exists because it is possible for both that they can exist.
namely that we cannot be certain of anything, as your thread suggests.
This is what Descartes said and later Hume (or Russel, I can't remember

) tried to prove Descartes wrong in the same way Apotheosis is now, by saying that basically this world just makes no sense if maybe we are in fact in a spaceship and our cats are in fact pink fluffy monsters (and we just haven't noticed that yet, just like we haven't noticed the black hole we are orbiting).
But Descartes says that there is one thing we can be certain of... that the 'I' exists, because other wise who would be there to even think about such stupid things as spaceships and fully pink cats? Does anything exist that has these perceptions you have now? Are you saying you can't even be sure that these thoughts feelings and perceptions you have now even exist? Or aren’t you sure you exist? But then who isn’t sure he doesn’t exist? Something is doing the thinking....
As Apotheosis said, if everyone can see the cat, then something very catlike is indeed there (something which makes us see fur and claws and ears, it doesn’t matter here in this argument that we don’t know what the molecules that cat is ‘made of’ look like’, because if nothing was there to cause these very similar perceptions, which are of course different for each person, then there would be no reason for them to say they were also seeing a cat.