Question

1. el esposo de mi hija es mi yerno.

lógico
ilógico

1. la hija de mi madrastra es mi media hermana.

lógico
ilógico

1. los padres de mi esposa son mis suegros.

lógico
ilógico

1. mi padre es el hijo de mis abuelos.

lógico
ilógico

1. la esposa de mi padre es mi madre.

Explanation:

1. For question 5: In standard family terminology, a daughter's husband is called a son-in-law (yerno in Spanish), so this is logical.
2. For question 6: A stepmother's daughter could be a stepsister, not necessarily a half-sibling (media hermana, which requires shared biological parentage), so this is illogical.
3. For question 7: One's spouse's parents are defined as parents-in-law (suegros in Spanish), so this is logical.
4. For question 8: A father is the child of one's grandparents, so this is logical.
5. For question 9: A father's spouse could be a stepmother, not only a biological mother, so this is illogical.

Answer:

1. Lógico
2. Ilógico
3. Lógico
4. Lógico
5. Ilógico