Rewrite this sentence in a more formal way:  “He was talking like he was the only one who knew everything”
He spoke as though he possessed full and exclusive knowledge on the subject matter.
Complete the following task based on the instruction and optional input provided.### Instruction:
Rewrite this sentence in a more formal way:  “He was talking like he was the only one who knew everything”

### Output:
He spoke as though he possessed full and exclusive knowledge on the subject matter.