Simplify the following text for a Grade 13 native English-speaking person.
Original: However , Stevenson has never claimed that he had proved the existence of reincarnation , and cautiously referred to his cases as being `` of the reincarnation type '' or `` suggestive of reincarnation '' .
Simplified: Ian Stevenson has never claimed that he had proved the existence of reincarnation , and cautiously referred to his cases as being `` of the reincarnation type '' or `` suggestive of reincarnation '' .