At adtech I met with and briefly interviewed the founder of Emotient , a San Diego based company founded by neuroscientists incorporating Ekmans work.
They claim to offer a model which says they can interpret emotion from facial expression and they’ve got an algorithm which proves it.
Sounds like this group of neuroscientists disagrees and has data to back it up.
context is essential to understanding meaning.

What Faces Can’t Tell Us

February 28, 2014
CAN you detect someone’s emotional state just by looking at his face?

It sure seems like it. In everyday life, you can often “read” what someone is feeling with the quickest of glances. Hundreds of scientific studies support the idea that the face is a kind of emotional beacon, clearly and universally signaling the full array of human sentiments, from fear and anger to joy and surprise.

Increasingly, companies like Apple and government agencies like the Transportation Security Administration are banking on this transparency, developing software to identify consumers’ moods or training programs to gauge the intent of airline passengers. The same assumption is at work in the field of mental health, where illnesses like autism and schizophrenia are often treated in part by training patients to distinguish emotions by facial expression.

But this assumption is wrong. Several recent and forthcoming research papers from the Interdisciplinary Affective Science Laboratory, which I direct, suggest that human facial expressions, viewed on their own, are not universally understood.

– Drsandyr