The judgment of inevitability: This shows the actual prescriptiveness of the subject (blunt judgment: roses are plants; hypothetical judgment: if the sun rises, it is daylight; judgment by choice: South American lungfish are either fish or amphibian). According to the above definition, which of the following is not a judgment of necessity? ['If the light is on, it must be powered on.', 'Water is a fluid.', 'Rabbit is a mammal.', "The color of the black cat's hair is all black."]