1. impossible to refute or deny; indisputable
Usage: formal

Examples

• The DNA evidence provided irrefragable proof of his innocence.
• Her argument was supported by irrefragable logic.
• The mathematical theorem rests on irrefragable principles.
• The witness testimony offered irrefragable evidence of the defendant’s whereabouts.
• His reputation for honesty was based on irrefragable facts.
• The scientist presented irrefragable data to support her hypothesis.