The data is not laundered. Preconceived ideas and biases are laundered and given scientific sounding justifications.

Concept Confirmer, Bias Booster?

Context Provider.

Affirmation Artificier?

Assessment Assurance, for double the bang.

Cherry Picker

Good role for all Perky Cheekers, surely!

Data Torturer? <https://en.wiktionary.org/wiki/if_you_torture_the_data_long_...>

Decision laundering. Take in dirty decisions and produce clean ones.

Most data is very dirty.

That would imply the data is clean when they are finished. GIGO