A matter of opinion Not technically a lie but certainly microdosing mistruth
Clever. It is, however, not a mistruth if the intent is not to deceive, or to convince under false pretenses.
A "joke" then, after a fashion If you were to tell one of these "jokes" and the resder fell for it would the joke become a lie?
If all indications are given of humorous attempt, and no request is made for clarification, then the error lies with the reader’s misunderstanding rather than the joke teller.
But as an "omniscient" being (for some debatable definition of "omniscient") then you will have already foreseen this hypothetical misunderstanding and facilitated it anyway That is deceit and you are a liar
I am not a babysitter, and I am not obligated to act as one. And though I anticipate the failure of comprehension, that does not mean I am the cause. I facilitate and push individuals and events into place, but I can not control thoughts. They are born solely from you, and thus only you hold the blame.