<span>Polonius
says that there should be a witness to the conversation other than the mother
because the mother might not give a full and unbiased account later on. This
indicates that Gertrude is no longer trusted.</span>
His satire is aimed at the "hypocrisy" of making an adventure appear more glorious than it was. He is trying to say that there is nothing glorious about war, there is only death and suffering, and it is definitely not a pretty sight.
