For context on why I have no sense of humor about this, on Earth (which _actually exists_, unlike dath ilan), when someone says "it's not lying, because no one _expected_ me to tell the truth in that situation", what's usually going on (as Zvi Mowshowitz explains: <https://thezvi.wordpress.com/2019/07/02/everybody-knows/>) is that is that conspirators benefit from deceiving outsiders, and the claim that "everyone knows" is them lying to _themselves_ about the fact that they're lying.
(If _you_ got hurt by not knowing, well, it's not like anyone got hurt, because if you didn't know, then you weren't anyone.)
For context on why I have no sense of humor about this, on Earth (which _actually exists_, unlike dath ilan), when someone says "it's not lying, because no one _expected_ me to tell the truth in that situation", what's usually going on (as Zvi Mowshowitz explains: <https://thezvi.wordpress.com/2019/07/02/everybody-knows/>) is that is that conspirators benefit from deceiving outsiders, and the claim that "everyone knows" is them lying to _themselves_ about the fact that they're lying.
(If _you_ got hurt by not knowing, well, it's not like anyone got hurt, because if you didn't know, then you weren't anyone.)