mechanism or you use the momentum decoder momentum encoder make using the momentum encoder for the keys and the predictive coding success story has been achieved in the contrast operator coding or CPC particularly the CPC version two and and and the instances combination success has been achieved in moko and sim clear moko means momentum contrast and Sinclair's into an instance contrast they use the corresponding mechanisms of contrast learning so let's look at CPC version two moko and Sinclair in terms of their positives and the negatives so