Earlier quoted context omitted.
"Most" doesn't mean "only". Non-heme iron is real, I promise. Hell they could really cheat and just throw ferrous sulfate directly in the mix rather than using naturally occurring iron in the veggies.
"Most" doesn't mean "only". Non-heme iron is real, I promise. No, it means that the Non-heme is less bioavailable i.e less efficiently absorbed from the body.
If you insist on reading the statement as "this burger has non-heme iron at quantities comparable to heme iron in meat that will also be just as bio-available" then yes, it's impossible.
However, I was trying to point out that there are several ways of reading that statement without it being marketing doublespeak.
TL;dr- I think we're arguing different points here.