Any people know that genius people are good at many things, they are not lazy, they do their work on time, have a good memory, but many types of research show that there are habits that show if you have a high IQ or not.
Intelligent people are lazier and less active and they are more likely to postpone their plans every time, it is a sign to prove you have a high IQ level.
We always thought good memory is what makes a person intelligent but that is not true, as a smart person forgets things, as forgetting will lead into making space for new information and makes you see things easily, so if you forgot something it means that your brain had made space for a new idea.
Cursing proves to be a sign of intelligent people,as who swear a lot have a huge vocabulary of words and proves that they are more intelligent.