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WE'RE BACK!

October 2025 lilbrary presentations return for another season of lively multi-media presentatioins on "ghost hunting" with from a skeptical viewpoint, including high-tech pseudoscience, skeptical inquiry, critical and thinking pitfalls like cognitive biases. Free admission and open to the pubic. Note: Portions of this presentation may not be suitable for very young audiences.

When and where?

Oct. 21, 6-8pm

Kensington Branch Library

4121 Adams Ave, San Diego, CA 92116

Oct. 28, 5:30-7:30pm

Paradise Hills Branch Library

5922 Rancho Hills Dr, San Diego, CA 92139

honoring the heroes of

skeptical inquiry

Faraday Cage: "Faraday" refers to physicist Michael Faraday, who in 1836 invented the Faraday cage. Also known as a "Faraday shield," Faraday cages do not have to take the form of an actual cage, but rather can be any sort of enclosure surrounded or lined by a mesh of conducting material that blocks electrical fields and radio frequencies. Its use in paranormal investigating is largely experimental and theoretical: working from the major premise that electromagnetism is a common principle of our physical universe and the unknown physical universe of the spirit realm, it provides an opportunity to rule out localized EMF pollution as the source of paranormal activity: if activity occurs within the Faraday enclosure, and it cannot be rationally explained by any other devices within, then its origins are potentially paranormal.

click for team bios

Investigation FAQs

Even if this is not your first time inviting an paranormal group, you'll still want to know what to expect when PPI conducts its investigation in your home or business. Here you'll find answers to the most frequently asked questions about how to prepare and what to expect.

PPI Podcast #4: Critical Thinking (2009)

Part 3 of PPI's presentation: Science and Beyond - An Educated Look at Ghost Hunting, is entitled Critical Thinking and Logic. Presented by PPI President and Co-Director Karl Sherlock.

Recorded March 21, 2009 at Grossmont College, El Cajon, California

Length: 00:17:04