conf (s_exp) set_conf (s_exp, number|s_exp)
Any Gamma or Lisp expression.
Any number, or any expression that evaluates to a number. Non-numbers are treated as zero.
All Gamma and Lisp expressions in Gamma have an associated confidence factor between 0 and 100 which may be queried using the conf function. This is typically 100, or fully confident. Exceptions arise only when the user explicitly sets the confidence to another value, or when a datahub provides a confidence value to the interpreter. The set_conf function will set the confidence of an expression to any numerical value, though legal values are between 0 and 100. Numbers less than 0 indicate indeterminate confidence. Numbers greater than 100 will produce strange results.
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