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What do Penicillin, Velcro, Viagra and PI Have in Common?

PostPosted: March 10th, 2017, 3:11 am
by teacherman
Simple question: What do Penicillin, Velcro,
Viagra and PI (Print Inversion, not the number) all have in common?

Re: What do Penicillin, Velcro, Viagra and PI Have in Common

PostPosted: March 10th, 2017, 10:37 am
by Braininvat
I was working with the Viagra and inverted print both making things pointing down to point up instead, but that didn't quite work with penicillin and Velcro.

Then I wondered if they've all been endorsed by Sen. Bob Dole, but I've only heard him endorsing the little blue pill and possibly say kind things about Velcro. "Bob Dole loves his Velcro!"

Then I moved on to to their all being naturally derived in some way - penicillin from mold, Velcro from cockleburrs sticking to the trousers of a Swiss engineer, PI from children turning books upside down....but no, Viagra doesn't fit, as it requires a complex process of synthesis.

At that point, I had to admit defeat. Unless it's something really broad and vague like "they all increase human happiness."

Re: What do Penicillin, Velcro, Viagra and PI Have in Common

PostPosted: March 10th, 2017, 2:40 pm
by Eclogite
I think each of them was discovered by accident, or the use to which they are now put was not the original intention.