Shedding new light on the evolution of the squid

Read the article found here.  The authors state: Octopus, cuttlefish and squid are well known in the invertebrate world. With their ink-squirting decoy technique, ability to change colour, bizarre body plan and remarkable intelligence they highlight that lacking a back-bone doesn't always mean lacking sophistication.  What do they mean by sophistication.  Using examples from the article explain what is meant by the use of this term.  List three interesting facts you read in the article.