Originally Posted by TobiSGD
But exactly that is the point, how can I install a base system, without knowing the dependencies, since the installer will not help me with that?...
This answer has nothing to do with Slackware, it seems you've never installed/used it.
In fact there are packages which are marked as "required", they are always installed and all other packages are optional and will run......
Well, Firefox without even a Windowmanager won't run, but to know this I don't need a packagemanager ;-)