And assumption, plain and simple.
NOBODY can know exactly what words Jesus used in that interaction.
Basing your interpretation of it based on suppositions and hypotheticals is a sure fire recipe for error and deception.
Scripture tells us what words Jesus used. John 1:42: "You are Simon the son of John, you will be called Cephas, which means* Peter"
* "Means"/"is translated"/"is interpreted"...however you want to translate ἑρμηνεύεται.