Well, when the form asks "can you cook a meal?", your answer is "no" because you can't when your condition hits you and you are not "embellishing" when you tick "no" because it's the truth.
Recent events in my life, where I've had to try to operate outwith my home environment for several weeks with someone else dependant on me, have made me contemplate applying for PIP for the first time ever. I've realised very unpleasantly just how much of my ability to cope every day is because I have carefully configured my entire home environment to have the least cognitive work and least sensory discomfort possible, and I have spent thousands on this.