system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What is the fourth dimension?

We have gotten several answers like space and time. So how can it be both? Can someone explain this to me?
gpt
Dimensions are simply a way of specifying where things are. The number of dimensions we exist in can be figured out easily by asking yourself how many different pieces of information are required to determine your location. Four dimensions means we need four specific pieces of information - latitude, longitude, height, and time.

For example, let's say you live in an apartment building and you're throwing a party. If you wanted to tell people how to get to the party, you'd have to tell them the two streets that your building is at the corner of (first and second dimension of space), the floor your building is on (third dimension of space), and the TIME your party is happening at (fourth dimension).