A slave master is highly motivated to invest in a slave's skills, because the master extracts the profit of that investment.

That's what gp comment is saying. Rewriting it for clarity:

"If you have a chattel slave, investing in teaching them new skills is not a waste of money".

That's called a fried apple pie in the USA.

Two of the A endpoints are the same,so don't need to be encoded twice.

With good lighting control, you could set up he checkerboard illusion in the real world. That's part of he point.

The point of ACA was to make not being insured more hassle than being insured, to motivate you get insurance, not complain about the hassle of being uninsured. Maybe you philosophically oppose insurance, but it isn't ineffective at its stated goal

On some topics of debate, as it goes, they say, "the Devil has enough advocates already".

But computer programmers are logical by training and profession, so we can trust that our own analyses are always correct.

Try putting as much effort into correcting your own mistakes as you do into correcting others. Being correct but in a biased way is practically equivalent to being wrong.

There aren't enough free ranges to product the eggs people want. Does everyone want tl pay $1 per egg? The answer is to be less greedy about animal produce.