Welcome to the Knowledge for Use Web site...from the Oregonians for Rationality Web site.
Explorations at the edges of human comprehension
Wise up    ...and don't dumb down.
Click on pictures below to take you to some relevant Knowledge for Use Web pages.
Click on the logo above to go directly to the three doors into the site.
Click on the nutty nuts to see more of Da Vinci Days.
Seeing Science
through the eyes & mind
Know some science?
  Off to Orion . . . and hidden places beyond
Click above to see stars
Can you use it?
  'It happened far away on a rainy morning in the West...' Click above to hear a spider
...in today's technological society it's pretty important
Click above to SEE SCIENCE
If you can't use it, perhaps you should lose it!
It's probably a misconception.
Science since Galileo has been discoveries made at the edges of human comprehension.
Discovery that sometimes our first glances tell us lies.
Science is discovery of second glances.

Da Vinci Days, 2003

For a slightly different viewpoint see Explore PDX.

Da Vinci Days      Corvallis, Oregon      July 21-22, 2001The cards on the back wall tell of many obvious yet unobserved things.

Life is a treasure hunt for the Platinum Plover Egg!
See Da Vinci Days
(click on the nutty nuts)

Very pretty.    But it doesn't solve the puzzle.
Corvallis, Oregon, July 22, 2001
Da Vinci Days July, 2001 . . . puzzles (and wonders) for everyone! . . . from Oregonians for Rationality
Children often do better than their parents in visualizing this.
Cut and fold a 3 X 5 card to make this.
One of Martin Gardner's first puzzles in Scientific American.
Can you place 31 dominoes on the 62 squares?  (Two of the chessboard squares are gone.)
A truly remarkable puzzle that has many solutions. 
But first, THINK. Pack the blocks (18) in the box.
Anyone can solve this with a little trial and error.  
But still, THINK.  It's better.
Pack the blocks (6) in the box.
Understand this, and you understand something very profound. Arrange the ellipses so that the closer they are, the more similar--and the more similar, the closer.
Immerse yourself in some simple (but sneaky) puzzles to discover how magicians can fool us, hucksters might gull us, and tricksters try to make us look silly.

So we must try to...
Be the magician
Foil the huckster
Learn a few good tricks of our own


Knowledge for Use Web site is a maze of puzzles, hidden clues, mysterious messages, and surprises

...woven throughout a treasure hunt for the understanding of science and mathematics.

Perception is the beginning of knowledge...
What does ours NOT tell us?
The Human Kaleidoscope.    Popular demand pushed its use far past closing time.


Competing in a technological culture requires some understanding of science and mathematics.
"Seeing" concepts is essential.  "Blindness" to concepts leads to today's prevalent pseudoscience.

                              ... and to unusable knowledge