"The results of the telepathic experiments carefully and plainly set forth in this book standly surely far beyond those which a nature investigator holds to be thinkable. On the other hand, it is out of the question in the case of so conscientious an observer and writer as Upton Sinclair that he is carrying on a conscious deception of the reading world; his good faith and dependability are not to be doubted. So if somehow the facts here set forth rest not upon telepathy, but upon some unconscious hypnotic influence from person to person, this also would be of high psychological interest." (Preface by Albert Einstein to Mental Radio by Upton Sinclair)
This sounds to me like Einstein is endorsing the study of parapsychology and finds Sinclairs work worthwhile.
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