Depends on the state:
GA:
You think you are pregnant
You are a child or teenager
You are age 65 or older
You are legally blind
You have a disability
You need nursing home care
As I understand it, one is ineligible from 19 to 65 unless one is blind, disabled or pregnant. In general, Adults 19 to 65 need not apply.
My first hand experience is typical.
I met someone who was close to illiterate, but able-bodied, and unemployed for years now.
His wife is on disability.
He is currently applying for permanent disability.
He and his wife went to a casino a recent weekend. His wife lost $500 and had to phone her sister to send her money to get home. He related he was pissed.
These people are so sure of their right to entitlements, that he had no hesitation in telling me his exciting story. We were strangers two months before.