'Unless' in the Bible

Of such a one I will boast, but of myself I will not boast, unless in my weaknesses.

For in what is it that ye have been inferior to the other assemblies, unless that I myself have not been in laziness a charge upon you? Forgive me this injury.

examine your own selves if ye be in the faith; prove your own selves: do ye not recognise yourselves, that Jesus Christ is in you, unless indeed ye be reprobates?