TAZ wrote:If we win tonight against Wigan we'll be level on points with Man Utd.....

This reminds me of my first year calculus lecturer as he was trying to explain the difference between if... & if and only if... as used in theorems.
"It is very important for you to appreciate the difference between if... & if and only if... ....". I can't remember the exact example he used then but I have an idea of examples he would use in a class today.
Example 1:If Arsenal wins tonight against Wigan, then they'll be level on points with Man Utd. But it is also true that for Arsenal to be on level points with Man Utd, they
must win against Wigan. Arsenal beating Wigan is a necessary and sufficient condition to be on level points with Man Utd. The correct statement to represent this should therefore be:
If and only if Arsenal beat Wigan, they will be on level points with Man Utd.
Example 2:If Man Utd wins all their remaining games, they will win the League this season. But they don't have to win all their remaining games to win the League [Jus Blazin 2010 post #831]. Therefore, winning all their remaining games is a sufficient
but not necessary condition for Man Utd to win the league. The correct statement to represent this should therefore be:
If Man Utd win all their remaining matches they will win the League this season.
End of the lesson.
Tomorrow we will learn how to use predicate calculus to represent a situation whereby a football team has won absolutely nothing in five years and also use propositional calculus to prove that "next season" is actually nineteen two thousand and never.
Never count on making a good sale. Have the purchase price be so attractive that even a mediocre sale gives good returns.