An outlier or the norm

Junior 1: You're asking me to cherry pick data and I obviously can't do that.

Senior: Why?

Junior 2: Because we are not going to get a clear picture of whether or not the test works.

Senior: But those were OUTLIERS.

Junior 1: Yes, I am sorry but what exactly is an outlier? ... Because it seems to me that it is just a data point that isn't doing what you want it to do and --

Senior: We consider that an outlier.

Junior 1: But then, there would be outliers in every data run we've generated so far.

Senior: Right, and WE DELETE OUTLIERS.

Junior 1: OK, I'm, like, not trying to make a big thing of this. I just think ...

Senior: You sure? ... It seems like you are. [pause]

Senior: We delete outliers. That's what we do.