The Good Oil on Divining

1 February 1999

James Randi has demonstrated that a water diviner has a 94% chance of success in finding water for the simple reason that 94% of the land surface has fresh water immediately below its surface. The diviner is likely to fail miserably when he/she is asked to find a dry spot. The notion that water flows in rivers underground is only true for some exceptional places, usually associated with limestone deposits. Normally, water is trapped in microscopic pores and only moves a few centimetres to a few hundred meters per year. Similar misconceptions and statistics are seen in oil divining.