Answer:
Although reincarnation is not a scientifically proven fact, its existence cannot be disproved either. Reincarnation is central to Buddhist philosophy. Without the existence of reincarnation, among other things, the law of karma would not hold, thus throwing into question almost all other tenets of Buddhism (Tibetan or otherwise). At the same time, Buddhism is a religion that asks practitioners to examine each of its beliefs closely before accepting them. Of all other world religions, Buddhism is probably the one that places the least importance on blind faith.
