The onus really is on diners to know the system and use it properly, because one wrong move could cause mayhem like this to occur.
システムを知ることとそれを正しく使うことの責任は客にある。ひとつの間違いがこのような大惨事を引き起こすことになるからだ。
Optimized studying based on the forgetting curve vastly improves memorization. - What is reminDO?
Memorize