Watchtower June 1, 1960, pages
"We must tell the truth to one who is entitled to know, but if one is not so entitled we may be evasive."
Insight On The Scriptures,
Volume 2, 1988 pages 244-245.
"While malicious lying is definitely condemned in the Bible, this does not mean that a person is under obligation to divulge truthful information to people who are not entitled to it"
w07 2/1 p. 6 Why Be
So while Jesus did not utter an untruth, he gave them an incomplete answer in order to limit the possible harm they could do to him or to his followers.
But then they speak out of the other side of their mouth:
Will we let Solomon's course be a warning example for us? With similar rationalizing, one might share in extracurricular sports or clubs at school, underreport taxable income, or tell untruths when asked to reveal actions that could be embarrassing.