Is it? I've seen enough evidence as a child, looooong before naughties, to suggest to me that all is not real. Toys that change colour overnight and bottles of orange juice that suddenly appear in cupboards are quite strange occurences to a 7 y/o.
Then there's stories that other people have told me like TV aerials that "get lost", and then suddenly reappear, or those items that you put down in an obvious place that you then can't find.
As for the weird deja vu thing that happened to me last Thursday while waiting for the lights to change, let's not go there...
I mean, SERIOUSLY, all your input goes through your brain. Do you REALLY know you're not just some cells in a jar, a'la Beck in Futurama?
Good movie though, that Matrix