Percentage is a good rule of thumb for most things, since generally menu prices are within a sigma or two of the average. This implies that a higher total is due to more items and more work. This decays at the high and low extremes, although a case could be made that if you're at an establishment with exceptionally high prices, you're generally getting exceptionally fine service.

For a cup of coffee though, 15-20% is a joke. Either they just did their job, which justifies 0%, or they earned a tip, which justifies at least $1. For low menu-price items, 0%, 25%, 50%, 100% is a reasonable spread; you yourself tipped what I assume was about 100% on a $5 coffee. I think all four options are valid.

Ditch the "B"

I don't know the details of those two cases, so perhaps. As a policy it's still subject to the existence of false convictions though, so not worth it to me

You can tell the difference between "Just doing your job" and "Going above and beyond". If I know what I want and they just pour coffee in a cup, I'm probably not tipping, or maybe I'll round up. If I have a ton of questions and need help deciding, I'll probably throw them a dollar or two, depending on how complicated I make things.

My whole point is if the coffee is like $3, 25-50% is 75¢-$1.50, which is perfectly reasonable for someone who did go above and beyond. I can even see 100% if they were exceptionally fantastic, like that one you had a year or so back. If the coffee is $8, gtfo out of here with those percentages.

25-50% on a $2 coffee isn't totally unreasonable if you actually received great service.

How much was the coffee?

I would hypothetically be for the death penalty for heinous crimes if our judicial system was 100% foolproof. Unfortunately, false convictions happen surprisingly often, there have even been cases of death row inmates being exonerated. I don't think the benefits of the death penalty justify even one single wrongful death, so practically I'm against it.

That would be Greek Mythology, not Roman History

Who exactly do you plan on voting for that will prevent that? Remember, candidates that lose elections don't get a say in policy, so if they don't win their positions don't matter.

Lots of options, but ol' reliable based on availability is mustard with a bunch of black pepper.

Remember like two weeks ago when someone posted a question asking why IKEA was in business when good quality wood furniture was basically the same price? Hilarious.