This article shares three practical techniques to make AI answers more reliable: asking questions from a different angle (adding qualifiers), having multiple AIs compete against each other (cross-validation), and completing the logical chain (step-by-step guidance). It is suitable for writers, students, and professionals, helping to avoid a single perspective and improve the quality of decision-making. The article naturally leads to DiffMind's ability to help achieve multi-dimensional comparisons at the end.