What is INT4? Why does it exist? Where does it appear in Quantization?
Draw or describe a visual model of INT4. What does it look like conceptually?
Work through a concrete manual example of INT4 with real numbers or pseudocode.
How is INT4 different from related concepts in Quantization? What are the trade-offs?
Explain INT4 in plain language using an analogy. Could a non-expert follow it?