Determine if the sentence is true based on the text below:
Jacques Vallee is proud of the interdimensional hypothesis.

The interdimensional hypothesis (IDH or IH), is an idea advanced by Ufologists such as Jacques Vallee that says unidentified flying objects (UFOs) and related events involve visitations from other "realities" or "dimensions" that coexist separately alongside our own. It is an alternative to the extraterrestrial hypothesis (ETH).
It's impossible to say