Not p
p and q
p or q
If p then q
p if q
p only if q
p unless q
p if and only if q
~p
p & q
p V q
p -> q
q -> p
p -> q
~q -> p
p <-> q
(a) Alice is the chair of the meeting.
(b) Bob takes notes.
(c) Carol gives a presentation.
(d) Dave sets up the projector.
(e) Emily is available.
If Emily is available, then Carol gives a presentation. If Emily is unavailable, then Alice is chair of the meeting. Emily is unavailable, so that means Alice is the chair of the meeting. Either Carol is going to give a presentation, or Dave will set up the projector and Bob will take notes. But Bob will only take notes if Alice is the chair of the meeting. So, Carol will not give a presentation, but Bob will take notes.
If Emily is available, then Carol gives a presentation. If Emily is unavailable, then Alice is chair of the meeting. Emily is unavailable, so that means Alice is the chair of the meeting. Either Carol is going to give a presentation, or Dave will set up the projector and Bob will take notes. But Bob will only take notes if Alice is the chair of the meeting. So, Carol will not give a presentation, but Bob will take notes.