I have read in many forums that you should not tease across zero. Can someone tell me why for example it would be a bad idea to make the following wager:
Indy + 4.5
Philly + 4.5
So a 7 point teaser on two teams that I believe win their game outright, but I tease them and get two pretty good numbers covered in 3 and 4. I am not really interested to know that the Jets or GB will win and cover, I want to understand the theory. What is the fallacy, if there is one, on why teasing across zero in this situation, or any situation is improper.
thank you.