Stress seems to take him down. Our dog pulled a muscle in her leg and was limping. My husband seemed to go down with that. So that may be what your partner is experiencing. Got his DNA results through 23nMe the DNA testing site. He's adopted and we learned alzheimers was rife in his birth father's family. Sounds like it might be the case in your partner's. One last thing..I actually have a note in my phone to keep my mouth shut about the repetitive questioning. It helps. It's hard to have these conversations even with family. I don't want him to be relegated to 'crazy uncle' territory because he's so normal except for this short term memory veil. We walk a tricky path. He's out buying printer cartridges right now. Normal. Aaaargh. Give yourself a pat. You're OK.