There are people who disagree. Here is one compilation of theorems that are obvious and false: https://math.stackexchange.com/questions/820686/obvious-theorems

There are people who disagree. Here is one compilation of theorems that are obvious and false: https://math.stackexchange.com/questions/820686/obvious-theorems-that-are-actually-false https://math.stackexchange.com/questions/820686/obvious-theo...