Definitions

1. adjective

Impossible to test or verify the validity of, especially due to a lack of clear criteria or a complex and ambiguous nature.

“The new AI system’s untestable decision-making process made it difficult to trust its output.”

2. adjective

Not capable of being tested or proven true, often due to the nature of the subject or the absence of sufficient evidence.

“The philosophical concept of free will is considered untestable by some scientists.”