“... The saying about the unforgivable sin here may provide further evidence for some form of dependence by the Didache on Matthew. The evidence is very slight in extent, and the synoptic evidence is somewhat complicated. On the ‘standard’ Two Source theory, the passage constitutes a ‘Mark–Q overlap’. However, in so far as it is possible to determine the Q wording, Didache here appears to show agreement with Matthew’s redaction of Mark, rather than with the Q version. [...] Köster admits that the Didache is closer to Matthew than to the other synoptic versions here, but denies direct dependence in view of the lack of any significant features. However, it remains the case that such links as exist seem to be with features that are redactional in Matthew. ...”