But , for all the simple certitudes beloved of today 's publishing industry , there are some very big " ifs " along the way .
不过,尽管当今出版业钟情于绝对的肯定,但在其发展道路上,仍有不少很大的不确定因素。
They do so in a wide variety of ways : at a recent leverhulme lecture at the institute for fiscal studies in london , the economic statistician charles manski laid out a typology of unreasonable " certitudes " .