demonstrable

/dɪˈmɑnstrəbəl/

If something is demonstrable, it can be shown or proven to be true, making it clear to anyone who looks at the evidence.

The adjective demonstrable comes from the verb demonstrate, which means "to establish the validity of something" or "to provide evidence for." If a lawyer in court states that it's a demonstrable fact that a defendant behaved with negligence, it means that they can prove it with hard facts. If a medical researcher states that an experimental treatment had a demonstrable effect on survival rates, it means that the data support its effectiveness. Simply put: Anything that is demonstrable can be demonstrated.

Definitions of demonstrable

1. adjective

   capable of being demonstrated or proved
   “a demonstrable lack of concern for the general welfare”

   synonyms: provable

   obvious

   easily perceived by the senses or grasped by the mind
2. adjective

   necessarily or demonstrably true
   “demonstrable truths”

   synonyms: incontrovertible

   incontestable, incontestible

   incapable of being contested or disputed