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Metaphor: "It's train CNC!"

Simile: "It's like CNC for trains!"

Literal truth: "It's called DCC actually"

If your point was to add information, then there was a better way to do it.

At least I was trying to add information, where you were just making a dumb joke and then a dumb personal attack.

I was enthusiastically commenting on a healthy niche market and then I used a metaphor point out that it's not just a hobby or a toy that these people are working on. It's a sophisticated tool that interfaces with the outside world much like CNC, which happens to be my area of interest.

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