Table 3.
Grammar for Piraha (approximate) numeral system for the range 1–100.
NumberRuleComplexity
‘hoi1$=d$$1~$
∼2–4 ‘hoi2$=d$$3~$
∼5–100 ‘aibaagi’ $=d$$52~$
Σ = 9
NumberRuleComplexity
‘hoi1$=d$$1~$
∼2–4 ‘hoi2$=d$$3~$
∼5–100 ‘aibaagi’ $=d$$52~$
Σ = 9

Note. Each rule is composed of symbols, and each symbol adds a unit complexity of 1. We do not use subitizing because work by Gordon (2004) suggests that the numeral for 1 is inexact in Piraha.

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