Suppose Cleopatra VII Philopator was the last active ruler of the Ptolemaic Kingdom of Egypt, and famously known for her relationships with Julius Caesar and Mark Antony. She was a member of the Ptolemaic dynasty, a Greek family of Macedonian origin that ruled Egypt after the death of Alexander the Great.
Can we infer that "Cleopatra was a ruler of Egypt in the 18th century."? Yes, no, or maybe?