Don't move the goalposts. The claim was:
> I've never seen a calculator come up with the wrong answer when adding two numbers.
1.00000001 + 1 doesn't equal 2, therefore the claim is false.
> I've never seen a calculator come up with the wrong answer when adding two numbers.
1.00000001 + 1 doesn't equal 2, therefore the claim is false.
The original screenshot shows a number with 13 decimal places, and if you set it at or above 13, then the calculation will come out correct.
The application doesn't really go out of its way to communicate this to the user. For the most part maybe it doesn't matter, but "user entering more decimal places than they'll get back" might be one thing an application might usefully highlight.
When a personal experience is cited, a valid counterargument would be "your experience is not representative," not "you are incorrect about your own experience."
Note that I am referring to actual physical calculators, not calculator apps on computers.