The fact that you seem to not have seen this before indicates that you cannot actually always contract ‘you’ and ‘are’.

This is the line I am referring to, not any specific word. This sentence is nonsensical:

“The fact you seem to not have seen this before indicates…” followed by “that you cannot always contract ‘you’ and ‘are.’”

How are those related? If someone hasn’t seen this before… it indicates … grammar rules? How does not seeing it indicate a grammar rule?