Clarification on Fouls/False Multiple & False Double

[stickingthe3]

I was hoping that some of you Veterans could shed some light on the above topic for a somewhat Rookie official. As I continue to digest the rule book (NFHS), I am constantly seeking clarification from some of my mentors, co-officials and so forth.

However, this is one of those topics that no one has really been able to provide me an explanation as to what they truly are (layman's terms). I have a great understanding of everything else within 4-19, but just cannot seem to grasp a good understanding of 4-19-9, 4-19-12.

Please help

Thanks and Happy New Year