Alice is a character from Lewis Carroll's 1865 novel 'ALICE's Adventures in Wonderland'. She is a young girl who falls down a rabbit hole into a fantasy world populated by peculiar and anthropomorphic creatures. ALICE is often seen as a symbol of childhood innocence and curiosity, and her adventures have been interpreted in many different ways. The phrase 'A grin without a cat!' is a reference to the Cheshire Cat, a mysterious creature that appears in the novel and is known for its wide, mischievous grin. The term 'THINKER' is used to describe someone who is thoughtful and reflective.