What is the meaning of idiom come into question?

The idiom "come into question" means to be doubted or challenged. It implies that something previously accepted or considered certain is now being questioned or scrutinized.

Here are some examples of how it's used:

* "The company's financial stability has come into question after the recent drop in stock prices." This suggests that people are starting to doubt the company's financial health.

* "The politician's honesty has come into question after the leaked recordings." This means people are now questioning the politician's truthfulness.

* "The effectiveness of the new drug has come into question after a series of adverse reactions." This means that the drug's ability to work as intended is now being doubted.

Essentially, "come into question" indicates that something is no longer certain or unquestionable.