logic (method of human thought)

Kyūjitai form of 論理学: logic

atheist

conspiracy theorist

骨学者: osteologist

数:

吸う: breathe, inhale, suck

数字: numbers / 数次: number of times

水筒: canteen / 水痘: varicella / 水套: water jacket / 水稲: grain grown in a paddy field / 水頭: by the water / 水頭: energy represented by a column of water / 出納: adding and removal of money and goods

水位: water level / 推移: transition