A Canadian court ruling that a thumbs-up emoji counted as a valid signature causes Adam Engst to ponder the difficulty of knowing what any given emoji might mean.

This week’s edition of LittleBITS brings email from a friend of TidBITS in Ukraine, plus details about how you can now respond to TidBITS Talk posts with emoji, much like Apple’s Tapback feature in Messages. 

OS X offers many, many more characters than you can type on your keyboard, from emoji to handy typographic symbols. We explain how you can figure out what they are and enter them in messages and documents.