They have denied it in many ways and even recently. The recent update by Dr Bosch referenced modelling which itself modelled OS AND PFS. In doing so if it later turns out that they already was aware of an earlier indication of PFS failure or futility rec ( in contrary to other official statements I.e. 8k's etc previously provided) they would essentially be liable for hundreds and perhaps thousands of law suits for promoting the success these modelling attempts show. This is why it did not happen.
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