Grammar for Piraha (approximate) numeral system for the range 1–100.
Number
.
Rule
.
Complexity
.
1
‘hoi1’
3
∼2–4
‘hoi2’
3
∼5–100
‘aibaagi’
3
Σ = 9
Number
.
Rule
.
Complexity
.
1
‘hoi1’
3
∼2–4
‘hoi2’
3
∼5–100
‘aibaagi’
3
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.