hypothesis

不幸的是，现实生活并不支持这一假设。

Unfortunately, real life does not back up this ___hypothesis.

现有数据并不支持这一初步假设。

The available data does not back up this initial ___hypothesis.

研究者的假设必须通过严格的实验来检验。

A researcher's ___hypothesis must be tested through rigorous experimentation.