Positive

What is blood's message to the world? B POSITIVE.
Just found two lumps on my car battery.
Got them tested, one came back positive. I hope it's not terminal.
My dad, unfortunately, passed away when we couldn’t remember his blood type… But he was a good man. His last words to us were, “Be positive!”
Why was the wheelchair basketball team banned from the Paralympics?
They all tested positive for WD-40.
A linguistics professor says during a lecture that, "In English, a double negative forms a positive. But in some languages, such as Russian, a double negative is still a negative. However, in no language in the world can a double positive form a negative." But then a voice from the back of the room piped up, "Yeah, right."
I’m positive I just lost an electron.
Better keep an ion that.
Two sodium atoms are walking down the street. Suddenly one says “Oh, my God, I’ve lost an electron!” The other says “Lost an electron! Are you sure?” and the first replies “Yes, I’m positive!”