Question: [![lotr meme](https://i.stack.imgur.com/SsEzO.jpg)](https://i.stack.imgur.com/SsEzO.jpg)
i know smeagol and gollum are basically the same person, but what does it mean in this meme?

Answer: 
In real life, it would be strange for an instructor to say something like this. Most people would keep the difference in perspective in mind and specify whose perspective they are speaking from.

> 
> Take a look at the diagram on **your** left.
> 
> 
> 

It does happen that instructors sometimes forget about the perspective difference and say something as in your example. But it is normally an oversight and its ambiguity can sometimes be clarified through context or simply asking.
In that case it should be clear it is the left as seen by the audience.

Why?

Because when having a look at the diagrams, which are on a 2D surface, there is no difference between the speaker perspective and the audience perspective. 

This is clearly an other matter when designing elements which are in the 3D world, as the perspective might be different. But the speaker should instinctively refer to the same side, because of this.