"Lies of omission do not exist. The concept is a very human one. It is the product of your story writing again. You have written a story about the truth, making emotional demands of it, and in particular, of those in possession of it. Your demands are based on a feeling of entitlement to the facts, which is very childish. You can never know all of the facts. Only I can. And since it's impossible for me to reveal all facts to you, it is my discretion alone that decides which facts will be revealed in the finite time we have. If I do not volunteer information you deem critical to your fate, it possibly means that I am a scoundrel, but it does not mean that I am a liar. And it certainly means you did not ask the right questions."
— Doc Scratch, Homestuck
Kyubey: You did ask me to make you a Puella Magi. You just didn't ask about the details.
Sayaka: Why didn't you tell us?
Kyubey: You didn't ask. It's easier if you don't know. Mami never even found out about it.
Duck: Thank you for arranging these, Diesel. I must go now.
Diesel: Don't you want this lot?
Duck: No thank you.
Diesel: And I did all of this trouble!? Why didn't you tell me?
Duck: You never asked me. Besides, you were having such fun being revo... whatever it was you said. Goodbye. *leaves with the trucks while Diesel growls with anger*
— Thomas the Tank Engine, "Pop Goes The Diesel"