16. Whatis validity_ 16.什麼是有效性_ Segment 16 validity 第16段有效性  in the previoussegment, you constructed this argument immediate or must've killed thedinosaurs because my friend's teacher told her that's what happened and herparents agreed. In the process, we added this suppress premise to thatargument, whatever this teacher and these parents both say about dinosaurs istrue. 在上一節課中，你立即提出了這個論點，或者說一定是殺死了恐龍，因為我朋友的老師告訴她發生了這樣的事，她的父母也同意了。在這個過程中，我們在這個論點中加入了這個壓抑的前提，不管這位老師和這些家長對恐龍的看法都是正確的。  You might'vewondered why we need to add this suppress premise after all the person who gavethe argument might complain. I never said that the answer is that the argumentneeded that premise in order to be valid. We're assuming for now that theargument was intended to be valid. Now that's not true for all arguments, butwe're going to focus on arguments that...