Ideas are good

... if you put them in practice. In the end, you cannot say that an idea is good only by reasoning about it. You may always miss something when you're simulating the future in your head. You need to actually do it to test if it works or not, usually multiple times so that you know that if you got the expected results this was not by chance.

Another way of thinking about it is that let's say you are reading about some rule. You shouldn't think it is true or that it applies in any conditions because you trust who wrote it. You have to think yourself about it maybe more than you usually do by instinct when you are encounter anything new.

Which basically means to think critically. So ideas are good if you put them to practice. But if you apply this pattern to the process of reasoning about the patterns themselves it just means to think critically since the patterns are about thinking about how to think.