Thanks Rob, I gave that a try, but my table is now blank whenever I apply that filter. One possible reason is that each of the effects where I am activating a condition is asking me to define a single value. I left the value field blank, since it seems to me that would undo the work done when creating the two conditions.
Another possibility is that in the conditions, I entered the two values A and A & B as separate items, was I supposed to type “A or A & B” into a single value and delimit them somehow?
Let me know what other information I can provide