★一个问题用5至7句英文回答,谁来帮个忙?

A critical thinker is a person who usually does in-depth ananlysis on other people's theories,sayings or premises.He could tell the fault of such premises.Their opinions often would be treated as an expert's view.If they cannot make a substantial criticism on a premise ,which means he has notthing to fault it at all.Thus his criticism on such premise would be without any merit and not good at all but just barking at the wrong tree!
很高兴能够帮到你.