Things can be both. You have a genetic weakness to specific environmental insults that increase the probability you get alzheimer's for example. Another descr

Things can be both. You have a genetic weakness to specific environmental insults that increase the probability you get alzheimer's for example. Another descriptor for alzheimer's is type 3 diabetes: https://en.wikipedia.org/wiki/Type_3_diabetes https://en.wikipedia.org/wiki/Type_3_diabetes