Question: Demonstrate that each word problem is a valid argument. Use rules of inference to show steps and reasons in the proof.
If I take a taxi then I will be on time for my appointment and
If I take a bus or subway then I'll be late for my appointment.
I will be broke. If I don't take the subway and don't take a bus then I will take a taxi. I will not be late for the appointment.
Therefore, I will be broke.
Can you show that each problem is a valid argument?