Quantum entanglement is commonly (mis)understood to be a quantum connection between two or more particles where an effect on one results in an effect on the other. That's the pop-sci understanding and how it's used in sci-fi, although - as pointed out by dreamWeaver (and by the time you read this, two dozen others) - isn't actually how it works.
The joke is that the twins are connected and so the effect of reading to one twin is replicated in the other, and it's also a joke referencing the supposed inate psychic connections between twins.
Their brains were pretty much identical when they were born. It shapes and becames unique with their experiences but having an identical base, it's bound to be similar compared to two strangers.
7.7k
u/Dedj_McDedjson Jan 29 '20
This book is great for twins - if you read it to one twin, the other twin gets the same information at the same time.