New use of "unless"?

[Drew Danielson]

Mike Salovesh wrote:
>
> Arnold Zwicky wrote:
> >
> > herb stahlke records an occurrence of
> >  >"I can't eat it like that unless I have heartburn all night."
> >
> > i'm fairly sure i've heard "without" used this way in pennsylvania
> > dutch country, but i don't think i've heard "unless".
> >
> > arnold (zwicky at csli.stanford.edu)
>
> 1)  Could "unless" in this context be a substitute for "lest"?


I have heard people in Central PA use "unlest" in this context.