Yes, indeed. That's the way science works. (Even if the the science is too small, or big, or expensive for us to repeat the experiments personally, there is nothing but time, money, ability and laziness preventing us from getting the education and degrees, then getting actively involved and then we /could/ repeat the experiments.)
And for some religious people, it is also how their core beliefs work - they /know/ there is a god watching over them because they have felt him, or seen him, or whatever. The details are usually taken purely on faith, which is not a good thing, but I can appreciate when someone says they believe in god because they heard him speak.
I always felt sorry for the two Judas's. One was perfectly innocent, but is pretty much written out of history by coincidence of his name. (Even some of the NT writers failed to get his name right.) The other had the hardest and most important job in the whole story, and then Christians hate him for doing it. Don't they realise that without Judas' sacrifice, their whole religion would have failed to exist?