Semantic Line Breaks describe a set of conventions for using insensitive vertical whitespace to structure prose along semantic Boundaries. site
If we look at our Speed Bot as an example of an App Animal by Brian Marick, the two line separators – semantic line breaks – that are required to create a new paragraph (e.g. a new index entry on one of the List Indexcards) are the signal for the Speed Bot App Animal to add a new index entry to the stack and start its Speed Bot Journey.