In this article of the Watchtower, February 1st 2007, we get some very typical Watchtower double talk.
'Why be Truthful?' is the article. Page 6 says,
'What is a lie?'
Every lie is an untruth, but not every untruth is a lie. Why not? A dictionary defines a lie as 'an assertion of somethinkg know or believed by the speaker to be untrue with intent to deceive.' Yes, lying includes the intention to deceive someone. Hence to speak an untruth unwittingly - such as giving someone incorrect facts or figures by mistake - is not the same as to tell a lie.
Moreover, we need to consider whether the person asking for the information is entitled to a comprehensive answer.'
So basically, any JW can choose to rationalise that they do not 'wish' to tell the truth as they do not 'feel' that a person deserves the truth.
Of course what the WTBTS is basically saying is that its members should not the truth about the WTBTS, and should lie in court, to government officials and police. Anything to protect the coffers of the WTBTS!!