Last two sentences are correct. But what is so frustrating is that if you ask the boss for some ideas about a particular work and by the time the result was discovered to be incorrect and that created some problems, he blames you instead but in the first place this was suggested by boss himself. If you tell him that this was his idea he would deny it. This happened to me several times so what I did, I just keep some evidences about the discussions. This simple mistake can mean a huge impact on one's self-esteem, willingness to learn and drive to decision making. For me, to help improve anyone must have this principle- "Don't find fault, instead find a solution."