The gap between knowing a thing and seeing it is wider than it should be. A shaker of iron filings closes it in two seconds; a book, a chapter of paintings and a browser game take slightly longer and close it for good.
Iron filings in a spice shaker, so the field shows up
→ amazon.com
Two different trees, one English name, a century of paintings
→ eclecticlight.co
Start at the AND gate, finish running your own machine code
→ select.supply