This means that you are in IMC if:
• You are inside of a cloud
• The visibility is too low
• You are too close to a cloud
When you are in IMC you need to be flying an instrument flight plan. Flying VFR into IMC is very dangerous and there are a multitude of accidents that occur this way. Don’t be a statistic! Stay away from the clouds.
In fact, I recommend having personal minimums for visibility and cloud clearance that are even more restrictive than the rules.