It makes sense to start with the year zero when you want to do any calculations that involve dates that where before and after year one. If an empire was founded in 50 BC and dissolved in 50 CE to calculate its age when it was dissolved you have to acknowledge that there is no year zero so instead of just calculating 50 - (-50) = 100 you have to substract one which is counter intuitive. Because it went from year 1 BC straight to 1 CE.

A Chinese board game where the strongest AI just managed to beat the strongest human players a few years ago.

Type 1 diabetes only accounts for 5-10% of cases so you can assume that the numbers most likely mostly come from type 2 diabetes cases. I agree that this is making the data more imprecise than necessary but not completely useless.

That would mean paying a marginal tax rate of 100%. The maximum marginal tax in germany is 45%, if you make more than €277000 per year.

But you don’t get paid the “Pendlerpauschale”. You can only deduct it from your taxes.