Propositiones ad Acuendos Juvenes/Problems/11 - De Duobus Hominibus Singulas Sorores Accipientibus/Variant 1

by : Problem $\text {11 a}$

 * De Duobus Hominibus Singulas Matres Accipientibus: Two men marrying each other's mother


 * If two men take the other's mother in marriage,
 * what is the relationship between their sons?

Solution
Each son is simultaneously the nephew and the uncle of the other.

Let the people involved be:
 * man $1$ and mother $1$
 * man $2$ and mother $2$


 * Let son $1$ be the son of man $1$ and mother $2$.
 * Let son $2$ be the son of man $2$ and mother $1$.

Then:


 * $(1): \quad$ Son $1$ and man $2$ are both the sons of mother $2$, which makes son $1$ the uncle of son $2$

and at the same time:
 * $(2): \quad$ Son $2$ and man $1$ are both the sons of mother $1$, which makes son $1$ the nephew of son $2$

and vice versa.