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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

Baselines: Investigators use a baseline measurement of environmental conditions to determine environmental anomalies during the investigation. Measurements of temperature, radiation, electromagnetic fields, air density and pressure, and others are systematically recorded to determine what’s "normal" about the site; departures from those baselines, therefore, potentially suggest what could be abnormal or paranormal. Many groups use weather, solar and geological data as well, in order to create a baseline for the region of the investigation. 

click for team bios

Medical Matters

If you've been asked to submit information about your medications and medical conditions, please read on.

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