For anybody who has a research background, are data sets contaminated by deleting data that disagrees with the projects sponsor?

Sixgunsound

Inquiring minds want to know what qualified researchers have to say about the matter. The question is not given a context to avoid providing anything to troll about.

Updates
1 y
The point of this question is to gauge people’s awareness of best research practices. There isn’t a hidden agenda.
For anybody who has a research background, are data sets contaminated by deleting data that disagrees with the projects sponsor?
4 Opinion