The antonyms for the term 'became fact' are 'remained uncertain' and 'stayed unrealized.' When an idea, plan or a prediction is not fulfilled, it remains open-ended and doesn't become a fact. One can also use words like 'disproved' and 'invalidated', to describe when a claim or notion is contradicted by evidence or facts. Likewise, the phrase 'falsehood' represents a lie, an intentional deception which is not true. Conversely, one can use 'possible outcomes' and 'potential possibilities' to describe hypothetical situations that have not been confirmed or rejected yet. Antonyms for 'became fact' help us understand the vastness and diversity of our world, with many alternate realities existing concurrently.