mark m/tuesdays find t/TutGrp1 t/TutGrp2 t/TutGrp3
mark m/otherdays complement m/tuesdays
email m/tuesdays b/"class is canceled"
email m/otherdays b/"class as per normal"
In human-readable, email students in Tuesday groups telling them class is canceled, and email students in other groups telling them that class per normal
New command to invert a Mark? Will it be useful?
Possible use case:
In human-readable, email students in Tuesday groups telling them class is canceled, and email students in other groups telling them that class per normal