Yes, and I believe in reincarnation.
There is no evidence to support those claims, so belief in those claims is irrational. There also exists no way for people to have multiple lives at this point in time (people are working on a way)
Yet they can provide no evidence that reincarnation is real.
Just because something sounds nice does not make it real or even rational.
But to those that think it is possible, how is it? What allows for a person to be reincarnated?
But now you introduce something else that has not been proven, a spirit. Now evidence must be put forth for the existence of a spirit.
Life is a mystery that is being solved. We already understand evolution from single-celled organism to human.