demonstrably

Meanings

1. 1
   adv

   in an obvious and provable manner

   Their documentary sources are demonstrably wrong.

2. 2
   adv

   In such a manner that is capable of being demonstrated, shown, or proved (without doubt).

   The country has become demonstrably less safe under his leadership.

From demonstrable + -ly. First attested in the early 17th century.

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