Does accepting 'The museum is open from 9am to 1pm and 2 to 5pm Monday to Friday (with audio-visual shows in the afternoon), and on Saturday mornings.' as true logically compel one to accept 'The museum is only ever open in the afternoon.'
The museum is open from 9am to 1pm and 2 to 5pm Monday to Friday (with audio-visual shows in the afternoon), and on Saturday mornings.###The museum is only ever open in the afternoon.