Trifecta

1) A linguistics professor was lecturing his class one day.

'In English', he said, 'A double negative forms a positive. In some languages, though, such as Russian, a double negative is still a negative. However, there is no language wherein a double positive can form a negative.'

A loud voice from the back of the room piped up, 'Yeah, right.'

2) Robert went to his lawyer and said, 'I would like to make a will but I don't know exactly how to go about it.'  The lawyer smiled at Robert and replied, 'Not a problem, leave it all to me.'

Robert looked somewhat upset and said, 'Well, I knew you were going to take a big portion, but I would like to leave a little to my family too!'

3) Two lawyers arrive at the pub and ordered a couple of drinks. They then take sandwiches from their briefcases and began to eat.

Seeing this, the angry publican approaches them and says, 'Excuse me, but you cannot eat your own sandwiches in here!'

The two look at each other, shrug and exchange sandwiches.