Here's the thing about deciding who gives good advice and who doesn't, or who is intelligent and who isn't:
Unless you make a very concerted effort to banish preconceptions from your mind, your determination of who posts intelligently is probably 1% driven by grammar and vocabulary, 20% driven by quality of logic and 79% driven by whether they agree with you in the first place. Most people untrained in logic and debate won't even recognize that the disagreement is due to different underlying assumptions, but instead just spout "you're stupid and don't make any sense."
The reason I initially came over here is that I found my stuff reposted here and disparaged. Here:
http://www.sosuave.net/forum/showthread.php?t=141934
That thread, and the embedded links, are the key bases for my conclusion that the general rule above applies pointedly to this forum in particular.