They're boolean (single bit of information) but not boolean (single bit interpreted as meaning true or false). The LED isn't true or false, the microcontroller pin isn't true or false.
They're boolean (single bit of information) but not boolean (single bit interpreted as meaning true or false). The LED isn't true or false, the microcontroller pin isn't true or false.
This is semantic pedantry. The association true/1/high and false/0/low is well-known and understood.
Plenty of signals are asserted (true) by being brought low, or have 1=low (e.g. CAN).
huh? The LED isn't true or false, but whether the LED is on is true or false.
And whether the LED is off is false or true.