Defines necessary and sufficient conditions with examples.
Necessary: The item or condition that must be present for a certain outcome. In the given options, the internet cafe could be considered necessary if, for example, the question was related to online activities or communication.
Sufficient: The item or condition that guarantees the outcome. For instance, the fire station could be sufficient if the question was about emergencies or safety.
Example: Being a triangle is a necessary condition for being a three-sided shape.
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