Minimal Key Calculator

[Gerald H]

(03-13-2015 11:14 AM)Paul Dale Wrote:  The way the question is posed "least number of keys" would imply a minimum of two keys and disallow none or one. In this case two keys are clearly enough -- the morse code key and a power button

- Pauli

No, Paul, I must criticize your use of English.

While one is clearly disallowed, the expression is correctly "zero keys" or "no keys"!