1、Although many people believe that …, I doubt (wonder) whether the argument bears much analysis (close examination).
2、There is an element of truth in this argument (statement), but it ignores a deeper and more basic (important / essential) fact (reason) that…
3、The advantages of B outweigh any benefit we gained from (carry more weight than those of / are much greater than) A.
4、Although it is commonly (widely / generally) held (felt / accepted / agreed) that …, it is unlikely to be true that…
5、It is true that (True, / To be sure, / Admittedly,)…, but this is not to say (it is unlikely / it doesn’t follow / it doesn’t mean / it won’t be the case) that…