Fido Dido is a cartoon character created by Joanna Ferrone and Sue Rose. Rose first developed the character in 1985, on a napkin in a restaurant. They later stenciled Fido on T-shirts with the credo: "Fido is for Fido, Fido is against no one". These T-shirts became very popular in New York. Using only the above description and what you know about the world, "The cartoon character Fido Dido was first developed over 20 years ago." is definitely correct, incorrect, or inconclusive? 