English Translation
He knows the truth.
“Ra djuno lo fatci” is a sentence in the constructed language Lojban. This sentence translates to “He/she/it knows the fact” in English. Now, let’s break it down:
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“Ra” is a name assigning pro-sumti (similar to a pronoun in English). It frequently refers to a previously mentioned entity. In this sentence, it stands for “he”, “she”, or “it”.
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“Djuno” is a verb (specifically a gismu) in Lojban which means “know”. It shows the action performed by the subject “ra”.
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“Lo” is an article that is roughly equivalent to the English “the”, but it has specific semantic distinctions. “Lo” marks what follows as a sumti (roughly speaking, a noun phrase), and it refers to any entity that fits the description of the following word in the broadest sense.
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“Fatci” is a noun that means “fact”.
So, putting it together, “ra djuno lo fatci” signifies that a previously mentioned entity (he/she/it) possesses knowledge of a certain fact.