[Jaykay]

Hi Susan and face,

I hope it's okay for me to chime in here. I'm new to this site. Here are a few additional thoughts for anyone who is interested.

I've always learned and taught that the simplest way of saying something is often the best, most natural way.

Were you fired?
Did you fail your test?
Did he win the gold medal in swimming?
What can workers do if a child leaves the daycare without permission?

In addition to what you said, Susan, tone of voice can really affect meaning with these two phrases: Is it true that and Is it the case that. The wording can easily imply confrontation. If I don't want to seem argumentative, I would use a soft tone.

Written or Spoken
Is it the case that... and Is it true that... can imply one of two meanings:

1. Doubt
The writer/speaker has doubts about what follows the phrase.

Is it the case that you were fired?
Is it true that you were fired? (more natural)

If there is no doubt, and I just want to know the answer, I would say, Were you fired? This is very cold though.

In formal written language, this is what I would say if I doubted that Eric had won the gold medal in swimming:

According to the New York Times, Eric won the gold medal in swimming. Is this the case?

If I did not doubt the truth of the information, and I just want to know the answer, I would say,
Did he win the gold medal in swimming?

2. Emotional Confrontation
Chris is emotionally confronting John. Chris wants John to admit to what John has done.

Is it true that you did...

This can imply frustration and/or anger, depending on tone of voice.

Is it true/the case that you fired my husband?
Is it true/the case that you failed your test?

Your original example also implies emotional confrontation:

Is it the case that children can walk out of care homes & staff can't stop them? Here, the word case seems to imply some formality and perhaps even more emotion. In this case (=instance), I would add the word just, as follows:

Is it the case that children can just walk out of...

In casual, sympathetic language...
If John told me that James had failed the test, I might say to James (with a soft tone to my voice),

Is it really true that you failed your test? I know how hard you have been working.

The use of really softens the tone of the question. This is less argumentative/confrontational.

I hope this helps!
Jaykay

First Language: English
Elementary School Teacher
Canada