Write given propositions in the form "p if and only if q" in English. "The trains run late on exactly those days when I take it."

please note it has to be in form of p iff q
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The train runs late if and only if it is a day I take train.
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Inside philosophy as well as common sense, the term suggestion describes often your "contented" or"substance" of your meaningful declarative sentence or the practice regarding designs, represents, or looks that make up a new significant declarative sentence.
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