What needs to be clarified
Trace recurring phrases, distinguish documented text replacements from independently composed language and assess their effect on the authorship comparison.
Materials to prepare
- The disputed letter and complete reference messages in original files
- Saved pre-send drafts and available revision history
- Exported custom replacements and keyboard version information
What to compare
Compare replacement boundaries, spaces, punctuation and pre-send spelling variants. Reproduce the stated replacement with a controlled copy of settings, preserving original data. Mark those blocks, then compare remaining syntax and links between ideas, considering the amount of independent text and consistency across messages.
Possible outcome of the analysis
A map of technically caused repetitions and revised linguistic feature table may result; material outside replacements may be insufficient for a definite common-authorship opinion.
Limits of the conclusions
A shared setting does not identify a device owner or letter author. A current test cannot prove historical use without relevant saved data and confirmed input conditions.