Yup. Also, "deduced reckoning" would be redundant, as reckoning is
inherently deductive.

"Deduction" means going from the universal to the particular, as in
the classic example used in logic textbooks:

All men are mortal. Socrates is a man. Ergo, Socrates is mortal.

INduction is the process of drawing inferences from PARTICULAR
OBSERVATIONS, as in::

Socrates died. Aristotle died. Ptolemy died. Ergo, all men die.

Dead reckoning starts with "inputting" particulars--the airspeed of MY
airplane, the heading I AM going to fly TODAY, the CURRENT wind, and
therefore, it is an example of induction, not deduction.

Science is an inductive process. Statistics is inductive. Philososphy
and theology are deductive.

I suspect, but without any supporting evidence, that "dead" reckoning
comes from the use of "dead' in phrases such as "Dead right." "Dead
on." "Dead center." Meaning, "exact."

Dead reckoning is EXACT in that, provided the INPUTS are correct, the
results will be EXACTLY right.

That, BTW, is the case with all inductive processes. As the saying
goes, garbage in, garbage out.

If the winds are not as forecast, if you don't hold the heading
precisely, the results will be erroneous. But that is not a f ault of
the dead reckoning process.

vince norris