['exception'], 'bool argument' => ['#VALUE!', false], 'null argument' => ['0', null], 'issue 3574 null string invalid' => ['#VALUE!', ''], 'issue 3574 blank string invalid' => ['#VALUE!', ' '], 'issue 3574 non-blank numeric string okay' => [2, ' 2 '], 'issue 3574 non-blank non-numeric string invalid' => ['#VALUE!', ' x '], ];