That is basically my thinking. The link to a page where a designer opines about how the Radiation and biohazard are great symbols because they are no understand

That is basically my thinking. The link to a page where a designer opines about how the Radiation and biohazard are great symbols because they are no understandable on first glance, memorable and need to be taught. Just like a floppy symbol. If you are young you wont understand it and need to be taught the meaning, the only possible part is the "memorable" test but...well, opinions and all.