3 ms·

Correct Form: I didn't know that. He did it

• bccdee 6y ago
  Once multiple sentences are on the table, it matters a lot less. The real significant line is between "zero periods; none needed" and "one redundant period at the end."
  • adjkant 6y ago
    OP here, I was very much referring to the last period, not periods in general.
    • abacadaba 6y ago
      I'm just glad I'm not the only one who's thought deeply about this :)