Reverend parris did not want to expose the fact that the girls lied because

nobody would believe it and chaos or further mass hysteria would result
he would be seen as a liar, too
it would make the church officials look like liars
his daughter would be seen as a liar, too, and his reputation be ruined

his daughter would be seen as a liar, too, and his reputation be ruined

Explanation:

The play "The Witches of Salem" begins at the home of Reverend Samuel Parris, whose daughter, Betty, is ill. Parris lives with his daughter, his slave Tituba, from Barbados, and his 17-year-old niece, Abigail Williams. Betty fell ill when her father discovered her dancing in the woods with Abigail, Tituba, and several other girls in the village. For this reason, it is rumored that Betty's disease was caused by witchcraft, but Reverend Parris tells Abigail that he can not admit to having met his daughter and his niece dancing like heathen in the forest. Abigail says that she will admit to dancing and will accept the punishment, but will not admit the accusation of witchcraft. Then Abigail, Betty, and Parris tell lies about the other girls, they say that one of them danced naked in a pagan ritual and that Tituba was squealing in incomprehensible words. Reverend Parris does not stop them from telling these lies because he fears that his family will have a bad reputation.

"i care deeply about campaign finance reforms: - apex

because they can and they wanted to.