"I read an article where you *say* why the solar system is cool."
"I read an article where you *said* why the solar system is cool."
I think the first one can be used when the article is still there, accessible and the 2nd one when it's no longer there. I also think the 2nd version should be used when the person no longer agrees with what he said. Apart from that I'm unable to make out which one is more appropriate. I think that the 1st version is a bit better. I want your suggestions people on which one to use! Thanks a lot!