On the other hand, he did not accept as well founded the charge made by some of his criticsthat while he was a good observer, he had nopower of reasoning.
短语as well founded，as是什么词性/成分？well founed是什么词性/成分？
同意刘老师的解答。不过well fouunded或well-founded在此为形容词。as well-founded为宾补。
与其说宾补提前，不如说是宾语后移。由于英语句子有尾重原则，结构复杂的宾语后移到句末，就是遵循尾重原则。这种现象称为宾语后移——postponing of the object.