"Informed judgment" means making a decision or forming an opinion based on knowledge, facts, and careful consideration rather than just guessing or speculating. Full definition
A journal is an instrumental tool for helping students develop their ability to critically examine their surroundings from multiple perspectives and to make informed judgments about what they see and hear. (facinghistory.org)
We just need information that allows us, as authors, to make informed judgments about the path we should take. (jakonrath.blogspot.ru)
However, their application is inevitably fact sensitive and so whether or not a person is so acting will inevitably call for informed judgment by reference to the facts of a given case. (newlawjournal.co.uk)