formally
No user record in our sample, but formally has activity below (stories or comments). Likely we have partial data — the full bulk-load will fill profiles in.
No user record in our sample, but formally has activity below (stories or comments). Likely we have partial data — the full bulk-load will fill profiles in.
If the data set is large enough then there is no way to represent it as a functional relationship between finite dimensional vector spaces. In fact, this problem already is visible in existing large neural networks…
This is only true if the codomain has the relevant structure for vector operations. Functions are more general than vectors.
You should look into the pigeonhole principle.