Sitting in the teachers' office one day...
my colleague: "Hey guys, one of the students sent me a text message- do you know what this means? She asked what the difference is between 'VI' and 'VT' and how do we know when to use them."
me: "'VI' and 'VT' ... oh! Initial velocity, and velocity at a point in time t. Is this a physics problem?"
another colleague: "Maybe the 'V' is verbs?"
me: "Oh yeah, isn't there something like... transitive verbs? And... 'VI'..."
colleague: "Oh, transitive and intransitive. Got it."