If, as far as you can tell, the line in the sky relates to “nothing more than remaining clear of cloud”, you’re not reading and comprehending what Table 2.07 in MOS Part 91 says. Could you please (please) go and read that Table, and in particular Item 4 in that Table? All the way from the left column to the right column. Then read what’s above that Table.
If, for example, you are flying at 1,000’ AGL in G above 8/8ths of fog and below a layer of 8/8ths of cumulous with bottoms of - pick any number - 2,500’, you are “clear of cloud”. But are you operating in VMC as defined in MOS Part 91? I think not. You’re at or below 1,000’ AGL. If I’m wrong, it means the operational requirement in the final column against Item 4 in that Table is meaningless.
And I draw a distinction between “operating” generally and navigating and position fixing. I consider navigating and position fixing to be a subset of operating. There’s that saying about “aviate, navigate, communicate”.