# FAQ: Learn: Logic Gates - OR Gate

#1

This community-built FAQ covers the “OR Gate” exercise from the lesson “Learn: Logic Gates”.

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This exercise can be found in the following Codecademy content:

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#2

My solution is:

``````def OR_gate(a, b):
return NAND_gate(NOT_gate(a), NOT_gate(b))
``````

I think this should be equivalent to the solution provided, since `NOT_gate(a)` is defined as `NAND_gate(a,a)`.
However, in the testcases, for
A: 0, B: 0 the output is 1, and
for A:1, B:1 the output is 0.
Is the error in my logic, or is there a bug?