Actions are absolutely repeatable to a level of precision enough to achieve a desired goal. Hence your ability to type this comment, for musicians to perform music, for athletes to win games, so on and so forth. Repeatable actions are at the center of humanities ability to function.

All actions have variance, but the level of accuracy is only relevant to the prescribed goal. In the example of a basketball, the ball only needs to enter the top of the hoop from a given range of angles, at a range of speeds. As long as you are within this tolerance you will achieve the goal of making a basket. The whole concept of the game relies on this repeatability.

When a person learns to write they must draw a series of shapes. At first the letters are often difficult to read and will make the words they attempt to write unintelligible. As they practice, they refine their motor skills to within a tolerance of legibility. Each letter doesn’t have to be truly identical. Just within the tolerance of the goal.

So the key points here are; tolerance of repeatability is defined by the goal, repeatable actions are ingrained in nearly everything we do, and finally if you think that repeating your position through a series of pedantic semantics, goal post shifting or false premises is going to change the outcome of this argument, that might just be the definition of insanity.

I believe the idea is you would refill the original cartridge. You can get refill ink and a type of syringe to put ink back into the original cartridge. Those have been available for a while.

Imagine you are practicing basketball free throws. The goal of the practice is to get the ball through the hoop.

To be clear the key word is goal, which can be defined as an achievable end result. In this example the ball goes through the hoop or it doesn’t.

If you throw the ball away from the hoop in such a way that it doesn’t even come close to going through the hoop, a reasonable person would say you need to change your actions to get a different result.

However, if you do not change your actions yet you expect the ball to go through the hoop, this is unreasonable and could broadly be seen as “insanity” as a sort of pejorative for a person who may be suffering from mental illness or is simply being unreasonable.

Practice by definition is synonymous with iteration, which is repeating an activity while making changes to affect the result or outcome of that activity.

The statement is about the individual goal not the general activity you’re practicing.

This is a pretty decent comparison. Not everyone can have ASD because then it can’t be classified as a disorder. There is a threshold for being diagnosed just as with vision impairment. Those who are diagnosed are on a spectrum from least debilitating to most.