Does "lying" only refer to something you know is not true at the time you speak it? [closed]

Is it proper to use lying to refer to something one says one will do (or not do) and then later fail to follow through on, either due to neglect or forgetfulness?

I have heard twice in the same week, in completely different circles, people use lying to refer to something other than the intent to deceive.

I corrected it, the first time. When it came up the second time in a different context I wondered if I was missing something!

So sorry to even have bothered you all with this. Apparently these were folks making use of one particular definition of lie and ignoring or not aware of the obvious primary definition. You're right! It is right there in the dictionary!

Solution 1:

Wikipedia's article Lie says

To lie is to deliver a false statement to another person which the speaking person knows is not the whole truth, intentionally.

On this tack, an unintentional mistruth as asked about in the question is not a lie.

The Wikipedia article then lists 28 categories of lies, among which I didn't notice anything about forgetfulness. The category names are Bad faith, Barefaced lie, Big Lie, Bluffing, Bullshit, Butler lie, Contextual lie, Economy with the truth, Emergency lie, Exaggeration, Fabrication, Fib, Half-truth, Haystack answer, Honest lie, Jocose lie, Lie-to-children, Lying by omission, Lying in trade, Lying through your teeth, Minimisation, Misleading and dissembling, Noble lie, Perjury, Polite lie, Puffery, View from Nowhere, and White lie.

An untruth due to forgetfulness perhaps most resembles Bad faith:

As defined by Sartre, "bad faith" is lying to oneself. Specifically, it is failing to acknowledge one's own ability to act and determine one's possibilities...

Solution 2:

The OED definition is "To tell a lie or lies; to utter falsehood; to speak falsely". Most people draw a distinction between a lie and a mistake; if you believed what you said to be true, you are not lying. Therefore, if you said "I will do it" you were probably not lying, though you may turn out to have been mistaken.

Unfortunately, that is as far as the consensus goes. Some people, particularly children, tell falsehoods for the joy of it, without caring whether they are believed; whether this is lying is unclear (except to members of the Parents' Union). Some people make bold assertions without checking their truth, and claim this is not actually lying; they tend to be disbelieved. And some people (including senior politicians, I hear) choose their words with extreme care so that they will in fact deceive, but could be construed as saying something true, or at least vacuous. This is not generally punishable as perjury, but most people still consider it lying.

Solution 3:

The very first definition of lie at dictionary.reference.com says:

a false statement made with deliberate intent to deceive; an intentional untruth; a falsehood. Synonyms: prevarication, falsification. Antonyms: truth.

Merriam-Webster agrees:

to make an untrue statement with intent to deceive

I'm sure there are plenty more dictionaries you could find to cite.