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TORONTO — Sarah Thomson is welcome to take a lie detector test to prove she’s not lying about sexual assault allegations she leveled at Toronto Mayor Rob Ford, says the owner of a private firm who administers polygraphs for $600.

Christopher Dennison said people approach his company, Canadian Special Investigations, “every day” to prove they’re not lying, mostly about domestic situations, through his polygraph test.

Private companies offer polygraphs to the public, often with same-day results for non-criminal tests. The two to three hour tests are conducted on a single topic to get a conclusive result.

Thomson offered to take a lie detector test the same day as posting a picture of her and Ford on Facebook with accusations that the mayor “grabbed” her behind, that he appeared “out of it” and that Ford said she should have been on a recent trip to Florida because his wife wasn’t there.

Ford calls the allegations by the former mayoral contender and CEO of the Women’s Post “absolutely, completely false.”