Show me the blood test for autism, dyslexia, schizophrenia, obesity, intellectual disability, high IQ, dry skin, good sense of smell, or ignorance.
I think we both would agree there is no blood test for any of those. But things like obesity can still be measured via scale and measure.
On the side of IQ, even that is technically relative from an observational standpoint. A gifted person may appear dumb, average or brilliant to any one average observer regardless where the other really stands. This of course is not meant to deny or disparage anyone, but just to show the outcome of observation without measure.
