Self-study
Everyone in Biba's neighborhood is permitted to swim at Barton Pool at some time during each day that it is open. ██ ████████ █████ ███ ███ ██ █ ███ █████████ ██ ████ ██ ██████ ████ ███████ ████ ███ █ ████ ████ █ ████ █████ ████████ ██████ ████ ██ ████████ ███ ██████ █████
Summary
Everyone in Biba’s neighborhood is permitted to swim at Barton Pool at some time during the pool’s open hours.
No children under the age of 6 are allowed to swim at Barton Pool between noon and 5pm.
Between 5pm and close, only adults are permitted to swim at Barton Pool.
Notable Valid Inferences
Children under 6 are not allowed to swim at Barton Pool between noon and the pool’s closing time.
If there are children under 6 in Biba’s neighborhood, they are allowed to swim at Barton Pool at some time during the pools open hours.
If there are children under 6 in Biba’s neighborhood, they are allowed to swim at Barton Pool sometime before noon.
5.
If all the sentences above ███ █████ ████ █████ ███ ██ ███ █████████ ████ ██ █████
a
Few children under ███ ███ ██ █ ████ ██ ██████ █████████████
Could be false. The stimulus doesn’t give us any information about the age breakdown in Biba’s neighborhood.
b
If Biba's next-door ████████ ███ █ █████ █████ ███ ███ ██ ██ ████ ██████ ████ ██ ████ ██████ █████
Must be true. Everyone in Biba’s neighborhood is permitted to swim in the pool at some time during its open hours, and children under 6 are not permitted to swim from noon until close. So if someone under 6 lives in the neighborhood, the pool must be open for them before noon!
c
If most children ███ ████ ██ ██████ ████ ████ ██ ███ ██████████ ████ ███ ████ ██ █████████ ████ ███████ █████ █ ████
Could be false. Maybe a small number of children swim in Barton Pool and a huge number of adults do, and all the adults swim after 5 P.M.!
d
On days when ██████ ████ ██ █████ ██ █████ ████ ████████ ████ █████ ██ ███ ██████████
Could be false. The stimulus only gives us information about when different age groups are permitted to swim in the pool. It does not tell us anything about who actually swims in the pool, or when they choose to do so.
e
Any child swimming ██ ██████ ████ ██████ █ ████ ████ ██ ████████ ██████ ████ ██████
Could be false. If there are children in the neighborhood who are between 6 years old and adulthood, they’re permitted to swim in the pool between noon and 5!