It can help you generate possible explanations. It cannot certify one.
Someone replies, “I’ve got a lot going on this week.” The words say their week is crowded. An anxious reader may hear an exit. A reader steeped in avoidant content may hear deactivation. A hopeful reader may hear “wait for me.” All three have moved beyond the text.
Attachment theory becomes mind reading when a pattern label is treated as access to the sender’s private thoughts. “They are avoidant” turns into “closeness scared them,” then “they are pulling away because they care,” then “they will come back after they process.” Each step feels connected to the one before it. None was stated in the message.
The better use of attachment theory is practical. If a message activates your abandonment alarm, you can slow down before replying. If a conversation repeatedly turns into pursuit and withdrawal, you can name the loop. If someone becomes distant after every increase in closeness, avoidance is a reasonable pattern hypothesis. The theory guides your response. It does not make the other person’s mind available for inspection.
