It looks like those were chosen to get a opposite numbers for the comparison, +5% and -5%: > the expected value ... grows by 5% in every round ... but, crucial

It looks like those were chosen to get a opposite numbers for the comparison, +5% and -5%: > the expected value ... grows by 5% in every round ... but, crucially, a head and a tail experienced sequentially is different from two different agents experiencing them ... we have lost ... approximately 5% per round