Here is a good example: When I say "the 21-foot rule," crime fighters instantly recognize what it means. They probably saw it demonstrated in the academy, and they remember the safety message with just this simple saying. On the other hand, trainers often express their ideas in very smart sounding ways such as "a subject who is armed with an edged weapon and seven meters or closer to an officer with a holstered weapon will, in all probability, be able to successfully reach the officer prior to said officer drawing the holstered weapon and delivering two rounds." Sounds smart but it isn't very memorable.
Which is the goal! We need to make our training memorable; it needs to be "sticky!" In their book, "Made to Stick," Chip Heath and Dan Heath explain how our brains remember ideas and how we can make things easier to recall. One way is through memorable sayings.
A profession that faces so many risks needs to have lots of memorable lessons that mitigate those risks. I think we need to make up a bunch of sayings and plaster them all around. Things like "routine is what we are doing right before we get hurt," "bad guys' cars break down too," and "saw drunk, arrested same" have meaning for us that we can recall easily and help us stay safe, write reports better, or just generally do our jobs better.
So, the next time you are writing a general order, preparing an in-service class, or writing an academy lesson plan think about the core ideas you are trying to convey and make them stick when they hit the brains of the folks you are trying to change.