We're at least 95% ignorant

Remember being told we only use 10% of our brains?
Yet somehow every element is the result of millions of years competitive living and breeding.
You were right to be sceptical of the claim.

You know DNA codes the proteins that make our body but maybe didn't know only 1.5% of it is actually on the job.  All the rest, almost the totality of our generic inheritance, has been given a name: "Junk DNA".   That 98.5% is simply unknown, also the result of millions of years of competitive living and breeding.   Maybe that's changing.

You also know something about the universe and heard there's dark matter (which incidentally is the name of an excellent craft beer on the west coast).  Dark matter is now considered a mix of dark energy and dark matter, neither of which has been explained and between them they make up 95% of the universe.  Nobody knows what the heck it is but our 5% is very nice.

As Alexander Pope wrote:

"A little learning is a dangerous thing ;

Drink deep, or taste not the Pierian spring ...

Hills peep o’er hills, and Alps on Alps arise !"