system
Given the following post, respond as if you're commenting on Reddit:
human
In flatland, would the 3rd dimension be time?
gpt
It could be. However, answer me this.     
What is the second and third dimension to us? Is it width and height respectively, or length and width?    
The dimensions are arbitrary named and you would be correct if you named time as the first or second dimension.    
So yes, if in flatland you declare time a dimension you are wanting to measure, then you can name it the third dimension.