Evidence Pretense

Don't get me wrong
If I come and go like fashion
I might be great tomorrow
But hopeless yesterday
--The Pretenders

It is chic to say that policies are 'evidence-based.' What this means in practice is finding (or funding) studies with results that align with your prospective policy while ignoring all evidence to the contrary.

Of course, by selecting only data points that suit you, you are not being evidence-based at all. 

Just ceremony and pretense.