They call it Mental Reservation:


Quote:
A mental reservation is a deception that does not actually tell an untruth.

It is argued for in ethics as a way to fulfill both the obligations of telling the truth and of, in justice, keeping secrets from those not entitled to know the truth, but is regarded as unjustifiable without grave reason for withholding the truth.

A wide mental reservation is using equivocations and amphibologies to imply an untruth that is not actually stated.

In the strict mental reservation, the speaker mentally adds some qualification to the words which he utters, and the words together with the mental qualification make a true assertion in accordance with fact. This is widely condemned.



LINK




The RCC has even enshrined the concept in the Catholic Talmud [CCC]:

Quote:


Charity and respect for the truth should dictate the response to every request for information or communication. The good and safety of others, respect for privacy, and the common good are sufficient reasons for being silent about what ought not be known or for making use of a discreet language. The duty to avoid scandal often commands strict discretion. No one is bound to reveal the truth to someone who does not have the right to know it.

CCC 2489



. . . in the warped world of the scandal-ridden crime family that is the RCC, apparently Grand Juries and District Attorneys are getting 2489'ed.