A Cage of Confused Little Orderings

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Can you tell what's wrong with the following?

• We can distinguish the following five levels for interface design issues:
  • technology;
  • ergonomics;
  • individual psychology;
  • group psychology and sociology; and
  • organizational issues.
• Elbows have 2 degrees of freedom, while wrists have 1, and the neck has 3.
• January 11, 1998.
• Roman, Arabic and Peano numerals. (It may help to visit the exhibit on numerals before you answer this.)

The Slide Exhibit also relates to this issue.

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To UCSZ homepage.
To Tatami project homepage.
To UCSD Meaning and Computation Lab homepage.
To my homepage.

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10 February 1998; version of 24 January 2000.