On January 2, Burt asked Logan to loan him money ‘‘against my diamond ring.’’ Logan agreed to do so. To guard against intervening liens, Logan received permission to file a financing statement, and Burt and Logan signed a security agreement giving Logan an interest in the ring. Burt also signed a financing statement, which Logan properly filed on January 3. On January 4, Burt borrowed money from Tillo, pledging his ring to secure the debt. Tillo took possession of the ring and paid Burt the money on the same day. The next day, January 5, Logan loaned Burt the money under the assumption that Burt still had the ring. Who has priority, Logan or Tillo? Explain.