i would say that experience is sufficient evidence for belief in life after death. however this is belief, nothing that can be justified with scientific method. since (any out of body, near death, or so called religious experience) does not allow carry-ons, we can't take our science kit. so proof is impossible. however these experiences often times leave the individual with greater understanding or comfort than any experimental data.
now what about belief in science? the story is never complete. science requires our belief in a certain interpretation of data. and when something new is discovered, it is no problem to shift a whole set of beliefs to work with the new theory. but is the belief any different? scientists stand by their beliefs as much as religious fanatics or anyone else. can you say that data is any more or less justifiable than another means of interpretation? i think that depends on the individual. i mean there are lots of people who believe dinosaurs never existed. as well as people who believe in aliens.
so absolutes are out of the question. all that really matters is what goes on inside your head. science, experiences, (religion and religious text or whatever pink elephants you want to believe) are all means to the same end. in the same vein this is where you get accounts of experiences through a cultural lens. a christian will interpret things in relation to god, the bible, etc. a paranoid person may say it was because of the aliens. a scientist will provide physical evidence to explain. who is right? you can say it's a fact that your body will die, but the beliefs that you take with you are entirely a personal choice.