  We discuss some hitherto puzzling features of the small-scale structure of
cosmic strings. We argue that kinks play a key role, and that an important
quantity to study is their sharpness distribution. In particular we suggest
that for very small scales the two-point correlation function of the string
tangent vector varies linearly with the separation and not as a fractional
power, as proposed by Polchinski and Rocha [Phys. Rev. D 74, 083504 (2006)].
However, our results are consistent with theirs, because the range of scales to
which this linearity applies shrinks as evolution proceeds.
