Sometimes Christians make arguments which are broadly correct, but wrong in the specifics. They reach the right conclusions, but
do it by wrong reasoning. More often than not, they do this by inadvertently making
false claims about the meaning of Greek or Hebrew words, usually for lack of careful
research.
Now, it may be argued that perhaps this sort of error is not
a big deal, since the listener gets to the correct place in the end regardless
of the road used to get him there. Unfortunately, one of two things occurs: (1) the
listener cannot navigate to his interpretive destination again without his
misguided mentor, or (2) he can, and in doing so he too becomes a
proponent of errors in method, if not actual errors in doctrine.
Either outcome is undesirable.