[["What is this sketch for? How would you make an argument to prove this sketch was made by Picasso himself?", "The sketch is a simple line drawing of a cat's head. It is not clear what the purpose of the sketch is, but it could be a quick sketch or a study for a more detailed artwork. To prove that the sketch was made by Picasso himself, one would need to examine the style, technique, and materials used in the sketch. Additionally, one could compare the sketch to other known works by Picasso to see if there are any similarities in style or subject matter. It is also possible to consult with art experts or historians who have knowledge of Picasso's work and can provide an informed opinion on the authenticity of the sketch."]]