My second contender is Effect Size. Unfortunately, this term suffers from the ignominy of Nominal Fallacy. We think we know what this means but it is much more complex. I have long been trying to wrap my head around the use of this statistical calculation in education. It seems to have taken root in our edu-speak, however, it looks like we are using it incorrectly.
I am pretty sure I misuse ‘effect size’.
Personally, I prefer ‘warm data’ that is embedded in context. I recommend the most recent episode of Team Human.