Passage Summary: Because a character in an old battle painting looks just like a famous artist's self-portrait from that same year, experts think that artist must have painted the battle scene too.

Conclusion: The artist who painted the self-portrait is likely the same person who painted the battle scene.

Reasoning: A figure in a Renaissance battle scene closely resembles a known artist's self-portrait from the same year.

Analysis: The argument makes a leap from 'resemblance' to 'authorship,' assuming that if an artist's face is in the painting, their hand must have held the brush. To weaken this, we need to drive a wedge between the model and the creator. Perhaps it was a common practice for Renaissance artists to paint their friends, rivals, or even their students into large scenes. If you find an answer suggesting that artists frequently appeared in works they didn't paint, the 'mystery' remains very much unsolved.