John #4: After seeing your separate comment that you sometimes confuse meet and join (as in John #4 above) because their standard English meanings are similar, I began confusing them too:-)

I'm trying out the mnemonic that the M in Meet contains two \\(\land\\)s, and \\(\land\\) points upward to the subset elements; while the J in Join is vaguely \\(\vee\\)-shaped, and \\(\vee\\) points downward.