well bishops are 3.5 because they are useful more often than knights.
Bishops and Knights are equal

My opponents knights are always worth more than my bishops.
And his bishops are always worth more than my knights.

supposively a bishop is half a point mre than a knight but thats nonsense. it depends on the position. like whether the position is opened or closed, whether who has initiative. there's a lot of things to hold in perspective. it's not that black and white!

This "debate" is the same as asking,
"Are the king side pawns better or worse than the queen side pawns?"

This "debate" is the same as asking,
"Are the king side pawns better or worse than the queen side pawns?"
Psshhh. Everyone knows kingside pawns are better in open positions.

generally speaking yes a bishop is slightly better. one simple way of looking at is by placing a knight in the center of the board then counting the # of squares it occupies which is 8 squares. now put a bishop there. the bishop occupies 13 squares in the middle of the board. therefore the bishop is stronger!

do you know how many times this subject has been debated.
Still there are fools who don't accept that Bishops have slightly better powers than knights generally , except in few closed positions where knights are better.
So having a bishop pair and open position you are always better off. Atleast you can mate the king where as you cant with 2 knights.
You seem to want some simple and immutable rules about minor piece superiority. This will make you a very bad analyst.

well bishops are 3.5 because they are useful more often than knights.
It's reported that the + 0.5 in value over the N is due only to the bishop pair. Because of its color blindness the mobility of a lone bishop is useless if it has no targets .

Interestingly, KBB vs. KN can force mate.
OMG!
I was surprised too. Check a tablebase to see how.

You seem to want some simple and immutable rules about minor piece superiority. This will make you a very bad analyst.
But I am rather a good analyst !!!.
And the Rainman was an excellent driver.

do you know how many times this subject has been debated.
Still there are fools who don't accept that Bishops have slightly better powers than knights generally , except in few closed positions where knights are better.
So having a bishop pair and open position you are always better off. Atleast you can mate the king where as you cant with 2 knights.
You seem to want some simple and immutable rules about minor piece superiority. This will make you a very bad analyst.
But I am rather a good analyst !!!.
Chess is not so easy!

Won a sweet endgame good knight vs. bad bishop last night, would post the game but it was G-30 and I couldn't get all the moves. My king was ultra active so it was almost like I was playing with an extra minor piece. I find players below 2000 have a much harder time calculating knights than bishops. This is not the first time this has happened. I've won at least two one other "equal" positions with knight vs. bishop in the endgame, often with pawns on both sides of the board.
That must be special for you, I read a book once too
Haha, but anyway, I'm willing to leave it at we disagree. What we know is probably very similar, we just don't communicate very well with eachother.
Great recipe for a long lasting topic btw.