I doubt it. The fossil record indicates that 99% of all life of this planet has long since been rendered extinct.
This is a pretty busy planet in terms of life. That speaks to a significantly long wind-up.
How did a living being live off nonliving matter?
Everything is non-living by the time it's ingested. When you get down to it, it's all a conversion of matter into energy through the breaking down of molecular matter. That's why, no matter what you eat, it all winds up in your bloodstream as glucose.
Heck, we even discovered a type of bacterium that lives in sulphurous water and eats the minerals out of rocks. We wouldn't have found it had it not been for Mount St. Helens blowing its stack and leaving a mess of those critters strewn about the mountainside.
good arguments -you have them on the ropes... LOL