2.4. Non-deictic non-anaphoric usage:

Merry Wives of Windsor, Act III, Scene 3

Falstaff: What made me love thee? let that persuade thee
there's something extraordinary in thee. Come, I
cannot cog and say thou art this and that, like a
many of these lisping hawthorn-buds, that come like
women in men's apparel, and smell like Bucklersbury
in simple time; I cannot: but I love thee; none
but thee; and thou deservest it.

In this case that is used non-deictically and non-anaphorically as it neither has an antecedant nor a special referent in the speakerīs deictic center.

Be careful! Do not confuse the demonstrative pronoun that with the complementizer that in subclauses or with a relative pronoun!