Do you think Mike and Pat are pretty names, Aunt Kate ?" "Well, I can't say that my esthetic sense fairly swoons with delight at sound of Mike and Pat," she laughed.
"I'll tell you, Worthie," she suggested, looking up with twinkling eye after her young nephew had been experimenting with various intonations of Mike--Pat, Pat--Mike, "why don't you call one of them _Pourquoi_ ?" He walked right into it with the never-failing "Why ?" "Just so.

Call one _Pourquoi_ and the other _N'est-ce-pas_.

They do good team work in both the spirit and the letter.

_Pourquoi_, Worth, is your favorite word in French.

Need I add that it means 'why'?
And _N'est-ce-pas_--well, Watts would say _N'est-ce-pas_ meant 'ain't it'?
and more flexible translators find it to mean anything they are seeking to persuade you is true.