When you are making a good conclusion, you are trying to answer a question about a subject. When you move from finding to grouping, you do not know at first how many groups you are going to have. You have just seen that you can group the same things in different ways. So how do you know how to group the things you have found?
You need to group your things into a set of groups that all have something in common, and what they all have in common will be the answer to your question. Finding a meaningful way to group your things requires intuition. You may make several different groups out of the same things before you find a set of groups that have a meaningful relationship. At this point, reason can explain why.
One situation where conclusion making happens occurs when detectives investigate a crime. The detectives observe the scene of a crime, finding all the things that are there. Once all of the things have been collected, the detectives group the things to find a meaningful relationship that answers this question: "What really happened here?" Detectives may may need to make several different groups before that question is answered.