You can't assign a value to false, for example, so "anything" isn't everything (Node v22.17.0). > false = 4 false = 4 ^^^^^ Uncaught Synta

You can't assign a value to false, for example, so "anything" isn't everything (Node v22.17.0). > false = 4 false = 4 ^^^^^ Uncaught SyntaxError: Invalid left-hand side in assignment Fascinatingly enough though, you can assign a value to NaN. It doesn't stick tho. > NaN NaN > NaN = 42 42 > NaN NaN > (map behaves as described.)