To sum up, lacking enough evidence and reasonable analysis, the arguer's conclusion is not convincing. 作者的词汇使用功底深厚,只是有时候不要总是写长句子,适当的写些短句,突出一下重点。
arguer
[ noun ] someone who engages in debate <noun.person>
Arguer \Ar"gu*er\, n. One who argues; a reasoner; a disputant.
"But the intellectual chemistry with Bush is better," said a Thatcher aide, speaking on condition of anonymity. "He's not the same intense arguer and debater that she is; he's a much more relaxed chap who talks it through.