that was within range and you had line of effect to?
Example: a Diviner is at the beginning of a hallway and uses Send Senses to look around the corner down the hall. He sees an enemy coming from down the other end of the hall. Could he target that enemy with say, Magic Missle since he can see the target and nothing is blocking the path of the missle?
No. Seeing is not the same as having Line of Sight. Although by a literal reading of the rules you don't even have Line of Sight through a window, as its definition is based on Line of Effect. So do try your luck with the GM - and get ready for villains to start doing the same thing while scying on you...
A line of effect is a straight, unblocked path that indicates what a spell can affect.
bold is mine...
After getting home and doing some more looking into it once I read your post I have to agree with you mainly because of the bolded text. I had forgotten that part and always thought that line of effect just ment that there could not be any barriers between you and your target, and line of sight ment you had to be able to see said target.
So thank you for the input.