Usually people make the wrong assumption, that they can somehow dictate a concentrated effort on a project they see as important by stopping people from working on other projects. They make this assumption and don't further think about it but assume it must be right. This comes up so often that it's getting boring and I would like to get rid of it once and for all - hence the period.
But as you seem to knowingly disagree, I would very much like to hear your explanation on why you think that the Perl 6 people would work on Perl 5 if Perl 6 were abandoned even though they all very clearly stated that they wouldn't. You're not even making an assumption here, you're flatly denying their statements.