Fino.

"Look John look" said Janet "see how he has failed to grasp simple perspective. Notice the way the curved rim of the glass has been drawn as the base of an upturned triangle and the acute angle of the table edge looks all wrong."

"Yes but.."

"Be quiet John I haven't finished. The glass also gives the impression of not sitting on the table but fractionally above it. This person needs to spend much more time looking and drawing."

"See here Janet" said John " it's a photograph and the camera never lies."