unproven

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

If completed as designed, it would require complicated and still unproven in-orbit refueling.

From Barron's • May 20, 2026

Nuclear fusion, which joins atoms, is the reaction that powers the sun; the technology remains unproven.

From MarketWatch • May 18, 2026

More recently, reports from HHS-linked policy shifts show the agency removing or revising longstanding public health warnings, including content related to unproven medical treatments, further intensifying concerns among health experts about institutional credibility.

From Salon • May 9, 2026

The choice was rational: Long-term safety data was unavailable, efficacy thresholds hadn’t been cleared, and further investment in an unproven compound risked starving proven therapies of resources.

From The Wall Street Journal • May 5, 2026

Elsewhere in his essay, Greene does not hide the fact that many of his fellow physicists think that string theory and the multiverse are extravagant and unproven.

From "The Sense of Style" by Steven Pinker