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Undoubted
Absolute Certainty
Use 'undoubted' to express complete confidence about a fact, leaving no room for skepticism or questions. 
Not Hypothetical
'Undoubted' refers to realities, not guesses or theories; it's used for what's proven or acknowledged by all. 
Beyond Debate
Choose 'undoubted' when mentioning something that is universally accepted and cannot be challenged. 