Syllogism: Based on the premise of two blunt propositions containing three different terms, one blunt proposition is concluded, and every two blunt propositions have a common term inference. According to the above definition, Which of the following syllogistic reasoning is:. ['Either you said it wrong, or I heard it wrong, and I did not hear it wrong to indicate that you said it wrong.', 'If the cold wave comes, the temperature will drop, and the temperature has not dropped, indicating that the cold wave has not arrived.', 'Mercury is a metal, and metals are conductive objects, so some conductive objects are mercury.', 'Lao Zhang is a painter, Lao Li is a musician, they are friends, so painters and musicians can be good friends.']