Support John works five days each week except when on vacation or during weeks in which national holidays occur. ████ ████ █ ████ ██ █████ ██ ██ █████████ ████████ ██ ███████ ██ █████ ██ █ ███████████ ████ ████ █████ ████ ██ █████████ ███ ████ ███ ███ ██ █████████ ██████████ ██ ████ ████ ██████ ██ ███ █████████ ███████ ██ ███████ ████████ ██████████ ███ ████████ ████ █████
The author concludes that John must have worked in an insurance company from Monday through Thursday last week. This is because he he always works five days per week (four days in an insurance company, and Friday as a blacksmith) unless he has time off, and he had no time off last week.
The support establishes that John works in the insurance company four days per week, but it doesn’t specify which days of the week. If John happened to work on the weekend, then the conclusion would not follow.
The argument depends on the assumption that, for the last week, John didn’t work on the weekend.
Which one of the following ██ ██ ██████████ ██ █████ ███ ████████ ████████
John never takes █ ████████ ██ ████ ████ ███ ████ ██ ███████
Every day last ████ ████ ████ ███████ ██ ██████ ███ ██ ██████ ████████
John does not ████ █████████ ██ █████ ██ █████ ████████ ████████ ██████
Last week John ██████ ███████ ██ ████████ ███ ██ ███████
There were no ████ ████ ████ ██ █████ ████ ████ ██████ ██ ███ █████████ ███████ ███ ████ ██████ ██ █ ███████████