There Their They're
There Their They’re
Learn the ruddy difference.
I hate bad spelling, especially text speak. It seems to me that bad spelling and bad grammar these days is almost deliberate – as though its not cool to spell or punctuate correctly.
Buy this T-shirt for the grammatical pedant in your life! There’s also a version with a slightly ruder version of “learn the ruddy difference.”
More of my T-Shirt designs are here

