Dear favorite niece:
Rose is absolutely correct, you are wrong.
Also, since you stated your uncle is a Vietnam veteran, he may have had that stroke due to health issues caused by exposure to agent orange. The best thing you can do for him is to get him to sign on with the DAV (Disabled American Veterans) as his VSO (Veterans Service Organization) to advocate on his behalf to apply for Veterans Benefits.
A disabled veteran can collect both veterans disability and Social Security Disability.
Once he connects with a VSO, he will be required to give them a limited power of attorney to interact on his behalf to file for VA Benefits. It usually takes a year or more to get a determination and many get frustrated and give up or switch VSO's but that only extends the process.
Only 1 VSO can work on his behalf at any given time. So choose one and be patient but persistent and keep connected to his advocate to monitor progress.
In the mean time follow through with resources listed on pages of Soulight, Who~Knew, and Ekikaseven for readily accesible resources for expedited help.
Blessings,
Elaine
http://www.dav.org/contact_us. html
Soulight
Who~Knew
Ekikaseven