"But before he could even get a match, the polygraph registered an intense reaction on the part of the Dracaena. To Backster, the implication was as indisputable as it was unbelievable. Not only had the plant demonstrated fear — it had also read his mind."

Source: https://www.nytimes.com/news/the-lives-they-lived/2013/12/21/cleve-backster/