Mimmy falls back on his stock defence: a string of maudlin reminders of the care with which he has nursed the little boy into manhood. Siegfried replies candidly that the strangest thing about all this care is that instead of making him grateful, it inspires him with a lively desire to wring the dwarf's neck. Only, he admits that he always comes back to his Mimmy, though he loathes him more than any living thing in the forest. On this admission the dwarf attempts to build a theory of filial instinct. He explains that he is Siegfried's father, and that this is why Siegfried cannot do without him. But Siegfried has learned from his forest companions, the birds and foxes and wolves, that mothers as well as fathers go to the making of children. Mimmy, on the desperate ground that man is neither bird nor fox, declares that he is Siegfried's father and mother both. He is promptly denounced as a filthy liar, because the birds and foxes are exactly like their parents, whereas Siegfried, having often watched his own image in the water, can testify that he is no more like Mimmy than a toad is like a trout. Then, to place the conversation on a plane of entire frankness, he throttles Mimmy until he is speechless. When the dwarf recovers, he is so daunted that he tells Siegfried the truth about his birth, and for testimony thereof produces the pieces of the sword that broke upon Wotan's spear. Siegfried instantly orders him to repair the sword on pain of an unmerciful thrashing, and rushes off into the forest, rejoicing in the discovery that he is no kin of Mimmy's, and need have no more to do with him when the sword is mended. Poor Mimmy is now in a worse plight than ever; for he has long ago found that the sword utterly defies his skill: the steel will yield neither to his hammer nor to his furnace. Just then there walks into his cave a Wanderer, in a blue mantle, spear in hand, with one eye concealed by the brim of his wide hat. Mimmy, not by nature hospitable, tries to drive him away; but the Wanderer announces himself as a wise man, who can tell his host, in emergency, what it most concerns him to know. Mimmy, taking this offer in high dudgeon, because it implies that his visitor's wits are better than his own, offers to tell the wise one something that HE does not know: to wit, the way to the door. The imperturbable Wanderer's reply is to sit down and challenge the dwarf to a trial of wit. He wagers his head against Mimmy's that he will answer any three questions the dwarf can put to him.