I have trouble accepting the idea that if I am understanding correctly what others mean by mental reservation, that it is really any different from lying, if lying is defined as any deliberate deception whatsoever. If I tell you, “My competitor would charge you $500 a year for this service, while I will only charge $100,” while silently thinking to myself, “$100 per month, that is,” I am lying to you. I am deliberately saying certain words that, if understood as I intend them to be understood, will cause you to believe something that isn’t true.
There is a reason courts require a person to swear to tell the truth, the whole truth, and nothing but the truth – it’s to discourage people from pulling such shenanigans.
In the above scenario, of course, I am using a deceptive tactic to deprive you of information that you do have a right to – the cost of a service you are considering buying. The question, then, isn’t whether I’m clever enough with words to say something that might technically be true but which I have good reason to believe will be understood in a way that misleads you. The question is whether I might ever be justified in deliberately causing another to believe something that isn’t true.
Jimmy Akin
notes that the Pope formerly known as Cardinal Bergoglio willfully used deception to save lives, for what it’s worth.
One thing I notice in the
current catechism is that it still contains a qualifying phrase:
“To lie is to speak or act against the truth
in order to lead someone into error.” (Italics added.) What does it mean to “lead someone into error”? If someone is intent on committing murder, aren’t they already in error? By speaking against the truth for the moment, could it be argued that I am placing an obstacle in his already erroneous path?
I saw
this in the Catholic Encyclopedia:
(Emphasis added.)