My reasons (personal opinion only)
1. In the killing of TV48 49 diplomat, Conan (new decoration) saw through the murderer's trick in the case of extremely poor health, while Pinger fell into the trap of the murderer.
2. In the resurrection of TV 19 1 192, Heiji's reasoning seems to be in trouble, and then it suddenly becomes clear under the explanation of Shinichi. A new problem: borrowing money.
3. During the three days when TV479 and Hattori Heiji were together, Pingzhi and Conan (Xinyi) participated in "Detective Koshien Going to the Island" (although this plan was false). When Bai Matan reasoned about the murderer who was killed in Tianjinwei, their reasoning was different at first, but only Conan's reasoning was correct) and later Pingzhi was wrong in explaining why the murderer was afraid of thunder, but in the end. When talking about the reasons for attracting these detectives, Yueshui (the murderer) also said that because Xinyi is very famous, it can be seen that Xinyi has more experience in solving crimes, and it can also be seen that Xinyi has a higher IQ.
4. In the TV263 Osaka Double Mystery, the Swordsman and the City of Taige, Ye He said that Pingzhi should have a good game and hand over the case to Shinichi. He said Pingzhi should discuss it with Shinichi, and the new skills are better. (Although the final case was solved by Pingzhi independently, it can be seen that the new one is more powerful! ) Heizo (Heizhi's father) also told Kogoro that Heizhi is still lacking compared with him, but we all know that behind Kogoro is Conan (Shinichi)!
5. In the TV490 reasoning match between Hattori Heiji and Kudou Shinichi Ski Resort, Conan (Shinichi) and Pingzhi won the first match. (Of course, there are also many reasons for Xinyi events! )
Of course, in Princess and Dragon Palace City of TV29 1 Island, Shinichi guessed the girl's swimsuit in the competition with Hirazuka and lost.
However, I personally have a relatively high IQ!