The Westminster Confession does not presume to know the election status of anyone. All anyone can know is their election status.
Catholics have this entirely backwards IMO. They presume to know the election status of babies and people who have died, yet they don't know their own election status.
I wonder if Peter or Paul thought that they were saved while on earth?
But doesn't it presume to know that God creates innocent babies - born and forever - reprobate?
Catholics do not know the election status of babies. We believe that the Church can eventually know the status of saints.
And Peter had hope that he would attain everlasting life, not certainty. Faith, hope and charity. Not certainty.