It has come to my notice that, contrary to undeletion policy, there is a fashion on Votes for Undeletion for citing "Valid AfD" (shorthand for "validly closed debate on Articles for Deletion"). The citation of the undeletion policy had apparently also been edited to remove reference to the possibility of petitioning for undeletion on the grounds that a valid argument had been ignored.
Since Undeletion Policy is an official policy which all editors are expected to follow, I have replaced the inaccurate description of the purpose of the page, quoting the undeletion policy.
If there is a consensus to change official Wikipedia policy, this should be determined by discussion widely advertised and with broad participation; unfortunately this little corner of Wikipedia seems to harbor editors with other ideas. If undeletion policy doesn't suit them, they just ignore it.