Certain
Definition 1 of 4
Pro Tip 1/3
Indirect Reference
Used when you know the specifics but choose not to name them directly. A certain document needs your attention.
Pro Tip 2/3
General to Specific
Starts a sentence generally and narrows down to something specific unmentioned. There's a certain charm to this place.
Pro Tip 3/3
Implying Secrets
Can imply you know more than you're saying, creating a sense of secrecy. A certain individual has the answers.