All excuses?

Why are there people who think that chronic illnesses don't exist and that if you're not productive because of them, it's just laziness? I wouldn't even wish a chronic illness on my worst enemy. But many simply deny the existence of such diseases. Is there any reason for this?

Does the world have little empathy for people with disabilities?

Could it be that there's little understanding for people with disabilities in this world? Not everyone, of course, but if you're not as capable as you should be, few people will understand. In some countries, if you are disabled, you simply starve, but even in the better countries it usually means a life of poverty…

Why does brain performance fluctuate so much? How can brain performance be improved?

The question I would be interested to know why brain performance fluctuates so much and how one can increase/decrease/change brain performance? Why the question I personally enjoy STEM, especially mathematics, and spend many hours studying it every day. I'm particularly interested in hypercomplex algebras and everything surrounding them. I notice that my performance fluctuates greatly…