WHITE SMOKE 1958 -18- WE DON'T KNOW
Second uncertainty:Since we do not know what happens in a conclave, which is perfectly normal, we also do not know why Pius XII's successor, after being elected, accepting the position and taking a name, suddenly renounced it shortly afterwards. We should not give credence to all the more or less far-fetched hypotheses of those who claim to know what happened, because no one from the conclave has spoken.
The only thing that is certain is that the elected candidate accepted and then renounced: the rest is superfluous.
(Source: first comment)