Some "Law"

Ugh. I feel dirty for defending economists, but...

Laws are just commonly observed relationships, and observed relationships always exist within a given set of boundaries and assumptions.

Change the boundaries or the context, and the law may no longer apply.

Consider Newton's Law of Universal Gravitation:

F ~ Mm/r^2

This observed relationship doesn't hold under very large M or very small r. In those contexts, a different relationship is required. That doesn't invalidate this one, though. It just maks it situationally useful.

Which all of these laws are.

I've heard that the price of McDonald's food has doubled and people are definitely not saying "hey you get what you pay for" when it comes to McDonald's price increase and they're definitely not buying MORE of it.

You pay what you get for
If I decide to eat at a McDonald's (which is a very rare occurrence) I refuse to do so without their stupid 2 for 1 coupons which are the only way to get a reasonable enough price.

It's called a "law" because it's a principle behind how something works, not because it would be incontestably true. There are other examples of this, like Haldane's law having exceptions for fruit flies and ruki law working only partially for Balto-Slavic languages (it works for u i, not for r k).

In all cases, apparent violations are typically easy to explain, for example in Veblen goods there's value associated with the price itself, as a status symbol. "Look, I'm rich! I could be paying 10k for this good, but instead I'm paying 100k! Not a big deal~" (translation: "I buy overpriced shite. I'm an idiot and I deserve to be treated as one").

...sorry for being the unfunny guy who explains the comic. I couldn't help it.

A helium balloon does not invalidate the law of gravity.

The law of supply and demand describes market forces, but these are not the only forces that act on prices. Perceived value, fomo, FArtS, and even your basic fraud, all of these are also forces that act on pricing. Economics, like physics, does not happen in a frictionless vacuum.

That's not falling up. That's a phenomenon that is explained by physics. The Dinosaur Comic is saying that if gravity was found to be non compliant once, the law of gravity would be rewritten to make it make sense within the knowledge at hand. Economics has these regular events that invalidate a defined "Law" and they ignore it.
- Good luck finding any nontrivial law that applies to each and every instance of a human construct. “Money can be exchanged for goods and services” until you show up at a store with 10 kilograms of 1-cent coins. A single violation (or even many) don’t mean the underlying law (or rule or principle or guideline or whatever ‘less strict’ version you want to call it) is bad.
  Newton’s gravity is wrong. There’s no arguing about that. But still every middle-schooler around the world learns it because it is ‘good enough’ in all but extraordinarily special cases.
- Except those regular events aren't ignored, and they don't invalidate economic laws any more than helium balloons. When regular events are found to be non-compliant, the laws of economics are rewritten to make it make sense with the knowledge at hand. Those statements are equally true of economics and physics.

Astronaut with a gun, floating behind comic "always has been"

The textbook intro examples of the law of supply and demand aren't even true in practice.

They're all like "prices on ice cream will rise when it's hotter out so there is less demand for it!" and I have never found that to be true at fucking all.

That and I've never seen prices ever go down for any reason whatsoever unless it's some already volatile thing like oil/gas.

There's a lot of tactical thinking and gamesmanship that goes into pricing.

https://en.wikipedia.org/wiki/Pricing

As for economic theory, the value of economists, and the semantics of the word "law"... yeah....I'm not getting in to all that.

It's pretty simple. You don't care about a particular grain of rice unless it's special in some way (maybe something is drawn on it). Prices are always dependent on what people believe about the object. The "law" just defines the general parameters.

Also, there are many "exceptions" to the theory of gravity and apples do not always fall. Is an apple on a table falling? What about if you lift it? Oh my God, it's doing the opposite of falling! How is that possible?!?

Also, there are many “exceptions” to the theory of gravity and apples do not always fall. Is an apple on a table falling? What about if you lift it? Oh my God, it’s doing the opposite of falling! How is that possible?!?
The theory of gravity says that mass exerts gravitational force, whether that force is sufficient to cause motion depends on other forces being exerted on a given object. An apple sitting on a table is not an exception to the law of gravity, gravity is still happening, but the force of the table counter-balances it.