Can you think of some phrases that contradict each other?

Maybe like "legal ethics" or

Virtual reality – “Reality” that isn’t real.
Artificial intelligence – “Intelligence” that’s man-made.
Original copy – Often used for documents, though contradictory.
User-friendly firewall – Something meant to block users, but be friendly.
Digital detox – Using digital tools to escape the digital world.

ork & Business
Working vacation – Supposedly “off,” but still working.
Exact estimate – You can’t be both exact and estimating.
Open secret – Everyone knows, but it’s “secret.”
Organized chaos – Something chaotic that’s “organized.”
Mandatory option

Can you think of some phrases that contradict each other?
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