Equipped with an advanced detector that went against the law of nature, Da Li did not want to depend on the cheating device entirely. Therefore, he performed an analysis with the knowledge he had acquired himself, then drew a conclusion. After that, he performed detection on the sprinter with the advanced detector. He used the detection results to verify his conclusion, so that the factors he had neglected could be found.
This was quite similar to working on a difficult problem. You could solve it by yourself and get a result, then compare your result with the correct answer. This way, whether your original result was correct or not, you would always find your weaknesses and acquire new knowledge.
The advanced detector indeed detected several things Dai Li had missed.