Difference between ‘ Verify Element Clickable’ and ‘ Verify Element Not Clickable’

It is kind of simple question.

I want to know why there is a

[WebUI] Verify Element Not Clickable

 

I think it supposed to be only one verify element clickable.

I don’t understand why Not clickable exists.

 

Thank you.

Thank you!! you got me lol!!!

Imagine there is a text box followed by a Search button and requirement is that until and unless some text has been put into the same text box, the search button has to stay disabled and not clickable. So, how will you verify whether the same element is clickable or not? I believe this answers your query.