Pseudoscience describes any belief system or methodology which tries to gain legitimacy by wearing the trappings of science, but fails to abide by the rigorous methodology and standards of evidence that are the marks of true science.
1 Flex-fuel hybrid electric and flex-fuel plug-in hybrid are two types of hybrid vehicles built with a combustion engine capable of running on gasoline, E-85, or E-100 to help drive the wheels in conjunction with the electric engine or to recharge the battery pack that powers the electric engine.
Flex engines aren't wildly different from gasoline engines, nor are they space-age technology. The Ford Model T car, for instance, was a flex engine that burned either gas or ethanol. FFVs don't cost more to build, and they aren't more expensive in terms of sticker price, either.