Writing about how testing works, and what it can and cannot establish. Every article points at the records that evidence it.
5 articles · available in this language
You should be able to disagree with it
A review is useful when you can reconstruct the reasoning and decide it was wrong. Most reviews make that impossible.
Updated 8 min read
Two products, one face, one day
Almost every comparison you have read broke at least one of these rules.
6 min read
Design it for your worst morning
The best routine is the one you can repeat on a bad day. A method for building one, and for finding which step is causing the problem.
7 min read
Six words, no shared definitions
Matte, satin, natural, luminous, radiant, dewy. Six words, no shared definitions, and one reason you keep buying the wrong base.
6 min read
Four different failures wearing one name
Wear time is four separate things wearing one name. Here is how to tell them apart before you blame the wrong one.
7 min read