It is only mentioned in the introduction and conclusions.
lines 93-106 - I mostly agree with this paragraph but it is not said very clearly. Certainly we need to distinguish between long peptides formed spontaneously and those that are translated. But several questions still remain - were there long peptides before long RNA strands? Was there a way of reproducibly making the same amino acid sequence without translating it from RNA? If not, then is there any way that random non-encoded peptides could be useful to RNAs?