There are many ways to make a decision. Other people put off making a final decision. Deciding to do nothing is still a decision. Many people quickly make decisions, not bothering to gather much information.
Some people seek advice from a favorite source or two.
A few people know where to get relevant, reliable information, consider the pros and cons, and cogently make decisions. Some deciders gather such great volumes of facts that they get bogged down in the process. Decision-making involves acquiring knowledge and comparing alternatives. Traditional educators assume that the students know little about the subject and the teacher knows a lot. So, the teacher, having a full pitcher of knowledge, pours each student's empty glass full.