The meaning of "hardly know."

[Odessa Dawn]

I know some people are skeptical of big global summits and abstract political promises, but that's because they hardly know about the existence of any such goals, or that the goals we've got have in many cases been remarkably successful.
Source:Who should set the world's goals? - CNN.com



Does "hardly know" mean (don't know) or (knowing a little bit)?

 

[5jj]

Have you looked up 'hardly' in a dictionary?

 

[Odessa Dawn]

Have you looked up 'hardly' in a dictionary?

hardly adv ((ONLY JUST)) - definition in American English Dictionary - Cambridge Dictionary Online

hardly adv ((CERTAINLY NOT)) - definition in American English Dictionary - Cambridge Dictionary Online

 

[Raymott]

It means they know almost nothing about the existence of such goals.