config.inc.php vs defaults.inc.php

[boxyball]

Based on the names of the config files, I assume I am supposed to put all changes in the config.inc.php file and never edit the defaults.inc.php.
However, how come $config['enable_installer'] = false; does not seem to have an affect when it's in the defaults.inc.php file?

[JohnDoh]

everything in defaults.inc.php is overridden by the value in config.inc.php so if in defaults.inc.php you had `$config['enable_installer'] = false;` and in config.inc.php you had `$config['enable_installer'] = true;` then it is configued as true.