Question 1
Statement: All taxi drivers are rude. Only staff are taxi drivers.
Conclusions:
1. Only staff are rude.
2. All staff are rude.
Select the correct answer:
'Only staff are taxi drivers' means taxi drivers ⊆ staff. All taxi drivers are rude means taxi drivers ⊆ rude. So taxi drivers ⊆ rude ∩ staff. But rude could contain things not in staff, so only staff are rude is false.