Scientific conclusions can change when new evidence emerges.

Show me why

Revision is part of scientific reasoning. A well-supported conclusion is not as fragile as a tentative result: the amount and quality of existing evidence determine how much a new finding should change our view.

A common misconception

“Science has changed before” does not establish that an unsupported alternative is correct.

Where the limits are

The possibility of revision does not mean all conclusions are equally uncertain.

How we know

UC Berkeley’s Understanding Science describes an iterative process of testing ideas. A new claim should be checked for methods, reproducibility and consistency with other observations before treating it as a reversal.

Sources you can inspect

1. UC Berkeley / Understanding Science
   Frequently asked questions about how science works

   Explains why conclusions remain open to revision.

   Publication date not stated · Checked in initial research 2026-10-08
2. UC Berkeley / Understanding Science
   Science relies on evidence

   Explains testing and evidence-based acceptance.

   Publication date not stated · Checked in initial research 2026-10-08

Links were located in source research. Some publishers restrict automated access. Source presence is not institutional endorsement. Our citation standard

Revision history

• 2026-10-08Initial AI-assisted source research and scoped explanation. Awaiting owner editorial approval; not publicly verified.
• 2026-10-08Owner explicitly approved all content as created for public publication. Statements, sources and evidence classifications unchanged.