Thanks for the diagram. How about the following as a replacement?

"If this attribute is true and the event isn't rejected by the logger's level and filters, an event passed to this logger will recursively be passed to its parent logger and handled by the parent logger's handlers (after being handled by the original logger's handlers). The logger level and filters only come into play for the very first logger in this chain. For subsequent loggers, only the propagate attribute determines whether the event is passed to the parent."