The phrase "completely objective" is correct and can be used in written English.
For example, "We must strive to remain completely objective when making our decision."
Later he always talked about the interaction between the object and the measurement apparatus which was taken to be completely objective.
I was completely objective.
No human being can ever be completely objective.
"The appellate courts prefer someone new and completely objective".
"This research has, on a completely objective basis, confirmed our belief".
"You know I'm completely objective when I say, you've made a great choice!" she continued.
"To answer Oliver Smiddy's completely objective and non-leading question," writes Johs Robinson.
Today we saw a completely objective, repeatable, observation of something fundamentally new.
-Is it possible to remain completely objective when reporting news events?
"Even images that seem completely objective, like maps, are loaded with social and political meaning," she said.
You know -- thanks everybody -- you know I'm completely objective when I say you've made a great choice.
