This really gets into what we mean when we say believe. There is a slightly greater than zero chance that for some reason our measurement is wrong. Since belief in this case [and in all cases] implies faith, however little, this choice for belief is not based entirely in logic. Logically we can never have certitude so belief is never really justified by reason.
Though I meant this chance of error as extremely small, hence my allusion to the philosophical, funny enough this number has changed quite a bit over the years. Still, I did mean as an extremely remote possibility.
My 1976 Guinness book lists the peak at 29028, but this is clearly out of date. Obviously satellites make the difference.
Actually I knew this; hence the lack of quotes. This variation obviously works better for my evil purposes here. [:D]