Answer:
If the capital letter is symmetrical, only then would the letter be a vowel.
Step-by-step explanation:
Note, in logic a conditional statement or sentence refers to a statement that has a hypothesis (assumed condition), with a conclusion (or results).
In other words, the conditional statement is saying that a certain event would occur if the first condition is true.
For example, saying: if today is Monday, only then would tomorrow be Tuesday.