Home

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

EVP: EVP stands for "Electronic Voice Phenomenon," usually the imprint of anomalous voices on analog and digital audio recordings, or on the audio of video recordings. Although a majority of EVP are, in fact, voices, the term is also used to describe any sound discovered in the recorded findings that was not audible to investigators or other equipment at the time of the recording. Reputable groups use a standard of classification for EVPs in order to separate the most convincing or compelling ones from those that have a higher probability of ordinary explanation. Persuasive EVPs that seem to be direct communication to the questions, rather than random words or phrases, and which are clearly audible and unambiguous in content tend to be classified as Class A EVPs. The vast majority of such findings, however, falls into the category of Class C for its poor sound quality and high levels of white noise.

click for team bios

Children and PPI Cases

Because of the sensitive concerns that children can pose for a paranormal investigation, PPI follows special protocols about their involvement. We respectfully ask that you review the following guidelines about child cases and children's participation in the investigation process.

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