Well, it sounds reasonable and the numbers produced by this method should be 6-9% (6% if we use w[15]==0, 9% if we use w[15]<0.01), which is close to the number of people who misuse Hard, according to the survey.
Other than that, I don’t have much to say in support of my method. I agree that getting data from those users would be beneficial.
By the way, I developed a new feature to remedy the Hard Misuse:
Feedback is welcome!
This is my first glance at the answer buttons as well. I know Easy button is like, “Oh yeah, I got this very easy that I will remember this long term!”
And Hard button is like “Eh, I’m kind of wrong but I’m partially right either way”
I prefer a better documentation for it, if I bother reading the manual again
This is again.
Yes, but making the “Good” option the biggest one would separate it from the group, the opposite of what we are trying to do 
The only way to create a clear distinction from the three pass vs the one fail button on a small screen that I feel could work is this.
Edit: plus, the good button is in the middle of the screen, which makes it accessible from both hands. Maybe I could try a mock up with the “Good” a bit bigger than the other two but in the same place? 
Edit 2: here it is.
Common mistake, sadly.
Like mentioned, a documentation is a good idea for this
Show me where the documentation says that when you couldn’t remember, you can use the hard button?
The majority of users don’t read the manual.
The documentation says nothing about it sadly. Now, to me “partial forgetting” is completely forgetting one component of the flashcard so Again should be pressed. But even if we say that in the manual, most people won’t read that.
Even if users do not read the manual, they can get information from other sources that are based on the manual. A survey about the Hard button shows that users mostly know how to use it.
I only trust the manual sadly.
I just got the the idea of just knowing “Hard” means you know, but needs more time of it. Deck Options - Anki Manual
- Again marks your answer as incorrect and asks Anki to show the card more frequently in the future. The card is said to have ‘lapsed’. Please see the lapses section for more information about how lapsed reviews are handled.
If the again button marks the answer as incorrect and nothing is written about the other buttons, then we can conclude that the other buttons mean correct.
As for me, this is a terrible description of the buttons. And it must be explicitly indicated that the hard, good, easy button marks the card as correct.
The more I think about it, the more I think that this is the best possible solution
Does this design increase the minimum size of the anki window?
A certain type of people will not be able to look at such antisymmetry normally
Not only should this be Again, but if you got it 100% right but you didn’t know it as well as you want to, it should be Again. We aren’t studying to get to the point of knowing something vaguely enough to guess right. We’re studying to know it without question.
That’s too strict. If your answer was correct, it’s definitely not “Again”.
Btw, there are now official, approved by the main dev guidelines:
Disagree. If you are kinda guessing and you happen to get it right, I think you should mark that as Again. You don’t actually know it.
Oh, is that section new? @Deranged6605, maybe you hadn’t seen it yet. I assumed you’d missed it.
