My previous SCP was a flop, but I've learnt much from it. So now, before I write the SCP, I want to run the idea through people first. I'm guessing that was the first mistake I made on my last attempt.
My current idea is an SCP that takes on the form of the question, 'What is ████████?" which there is only one answer. Upon first attempt at answering the question, even if it's just subconsciously answering it, subject will go into a sort of trance-like state where the only thing he will do is attempt to answer the question until death by fatigue, starvation or dehydration. Upon successfully answering the question, subject will [REDACTED] and die instantaneously.
The SCP has a memetic effect and can spread both audio and visually.
SCP will be considered Keter class.
So, how does it look? Got the idea from Inception. A single thought planted deep within the mind that eats away at you until you die.