An engineer writes a letter to the editor of the local paper concerning the result of a product liability suit involving a car, identifies himself as an engineer, and gives some technical opinions. Which of the following must be true for the engineer’s actions to be ethical?

1. The engineer must be licensed in the state in which the letter is written.
2. The engineer must have a good amount of knowledge about automobiles.
3. The engineer must not offer undue criticism of the automobile designers.