Xiao Zhang asked Xiao Li to go to the mall the next day. Xiao Li said, "If it doesn't rain tomorrow, I'll go climbing. " There was a drizzle the next day. Xiao Zhang thought Xiao Li would not go climbing, so he went to Xiao Li's dormitory to find him. But Xiao Li was still climbing the mountain. When the two met again, Xiao Zhang blames Xiao Li for his word. Since it was raining, why did he go to the mountain? Xiao Li said that he didn't break his word and Xiao Zhang's reasoning was illogical. For the argument between the two, which of the following is appropriate? ['This argument between Xiao Zhang and Xiao Li is meaningless.', "Xiao Zhang's reasoning is illogical.", 'Two people have different understandings of drizzle.', "Xiao Li's comment caused the debate."]