It has happened to all of us.
We order a replacement for our much-venerated bottle, which has been kicking around in the bathroom cabinet for five years, and is now empty. We find, to our horror, that the replacement smells different from the original. This throws us into a desolate episode of buyer’s remorse, and we post reviews about the indecent violations our beloved scent has suffered at the hands of the latest reformulation.
But do we really know this?