`:I just added two ``citation needed`` tags to this section: the second and third sentences of the first paragraph and the entire last paragraph.  I like how this section describes the differences between state diagrams and flowcharts.  But the portions that I cited imply a negative connotation to combining states and flow graphs together, and I would like to add a section to this page on how there are some alternative semantics where states and flow graph constructs can be used together in one single state diagram.  However, before I add my section, I want to first check to see if there is indeed a citation available for these statements that imply that states and flow graphs should be separated from one another.  `