TOK Topics

“When Ingrid Carey says she feels colors, she does not mean she sees red, or feels blue, or is green with envy. She really does feel them.”

http://www.livescience.com/169-rare-real-people-feel-taste-hear-color.html

http://www.spring.org.uk/2014/05/6-intriguing-types-of-synesthesia-tasting-words-seeing-sounds-hearing-colours-and-more.php