Oh, gotcha. In that case, you’d want something like:
classification is not Faculty/Staff
OR vaccine status is not vaccinated
This does seem a little confusing to start with, but it’s right. Walking through it…
classification=Student or relative => will always show field no matter what vaccine status is because the first condition is true; the second condition doesn’t matter.
classification=Faculty/Staff, vaccine status Fully (or partially or ineligible):
Then we have first condition = false, second = true => show field.
classification=Faculty/Staff, vaccine status empty:
false, true => show field
classification = Faculty/Staff, vaccine status = Not => false/false => don’t show field.
The way I got there was like this:
Step 1: Suppose we wanted the inverse, then that’d be: show field ONLY when faculty/staff AND not vax.
Step 2: So we want NOT(classification IS faculty/staff AND status IS not vax)
Then we can apply De Morgan’s laws and get:
classification IS NOT faculty/staff OR status IS NOT not vax.