"if possible, always bring print-outs of your slides for your audience members." is this good advice?

In a way it can be.

It all depends on your audience and the presentation you are presenting.

Yes because if they want to go back and review a previous slide, this way they can do it without you having to go back to the slide yourself. Also, if someone is nearsighted or has a similar condition, this means they don't have to strain to see the slides.

I don't understand?!?!?!

what character rule?

Explanation: