Proc GLM, lm() do not auto-exclude subjects [RSABE / ABEL]

Dear ElMaestro!

» ...
» This is why the lm, PROC GLM, lmer etc take the appropriate decision for you. These functions or procedures will exclude the subjects that need to be excluded ...

I thought that this often spread misunderstanding was already cleared by this post and the follower of a well known Mahatma .

lmer() is another story since it's mixed muddle software.

Regards,

Detlew