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Inference question · #119 of 120
The greenhouse watering system waters every plant in the greenhouse except the cacti. The orchids are kept in the greenhouse and are not cacti.
If the statements above are true, which one of the following must also be true?
Show explanation
The orchids are greenhouse plants and are not cacti, and the system waters every greenhouse plant except the cacti — so it waters the orchids. Whether anything is also watered by hand is never stated.