You can't say something is "perfectly plausible" right after admitting you don't know any data supporting that hypothesis. The negative symptoms of lactose int

You can't say something is "perfectly plausible" right after admitting you don't know any data supporting that hypothesis. The negative symptoms of lactose intolerance is exactly due to microbes in the gut digesting lactose and producing metabolic byproducts such as gas. People who aren't lactose intolerant are free of such symptoms because lactose is digested with enzymes produced by the body before it reaches the gut thus depriving gut microbes of sufficient quantities of lactose to cause negative symptoms.