So anyway, this old guy goes to the doctors. The doctor says, "It's bad news, you've got cancer and Alzheimer's." The old guy replies, "At least I've not got cancer!"
Alzheimer's Patient
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Explanation
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Explain Bear
Alright, listen up, buttercup. This joke is funny because the old dude has Alzheimer's. Alzheimer's is a brain disease that makes you forget stuff, like where you parked your car or that you have cancer. So, when the doctor tells him he has both cancer and Alzheimer's, he's happy he doesn't have cancer... because he forgot he did! You probably forget stuff all the time.