How we measure · 2026-08-28
How we measure posting age, and what it does not mean
The definition is narrow on purpose. A wider one would be more impressive and less true.
Everything we have written about transparency: what the data shows, where the common readings go wrong, and what we can and cannot measure.
How we measure · 2026-08-28
The definition is narrow on purpose. A wider one would be more impressive and less true.
How we measure · 2026-08-11
Every number on this site depends on this definition, so here it is in full.
How we measure · 2026-07-15
A list of the gaps in our own data, published because you will find them anyway.