How to say in Czech: Is that the whole truth?

English
Is that the whole truth?
Czech
Je to celá pravda?
That is only half the truth.
He is telling the truth.
I find this whole discussion really stupid.
You didn’t write that.
You are young.
That is too expensive for me.
That is very kind of you.
He is not old enough for that.
He is not too old for that yet.
He is right about that.

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