Not false, just misleading
It's the kind of thing that sneaks up on me, slowly emerging in my consciousness.

The white-on-blue road signs posted along interstate highways, indicating which services are available at the next exit, use a fork and a knife resting on a plate to show that food is ahead.

Very rarely is that food served on a plate; more rarely still is it eaten with a fork and knife.

It's like how synthetic flavors have asserted themselves on our tastebuds---there's an artificial blueberry flavor, for example, that anyone can identify as "blueberry" even though real blueberries, with which the taster is perfectly familiar, are a completely different taste, also known as "blueberry." Perhaps a "blueberry one" and "blueberry two" or "blueberry (synthetic) and "blueberry (actual)."