Hello, would Wordpress work if it set 444 or 440 permissions for Wordpress files/folders to prevent writing into it?

I mean i would like to disallow anyone, even php files owner to modiffy existing files and write new files. Only when wanting to update wordpress i would change permission.

// Update: it appears site worked with 544 and 555 permissions. Here is how i did it (# TIP 4):
http://internetlifeforum.com/wordpre...ure-wordpress/