“The speech tag is still part of the previous sentence,” she explained, ‘so it isn’t capitalised.“

“What do you mean?” he asked. “But there’s a full stop as part of the question mark!”

She nodded gravely. “I know!” she said. “A lot of people find this confusing. But the speech tag belongs to the line of dialogue, it’s still part of the sentence, so it’s wrong to capitalise it.”

She reblogged the post again, because she had recently read far too many potentially enjoyable stories marred by poor dialogue punctuation.