In the book Understanding English Grammar by Kolln and Funk, pg 149, they talk about adjectivals modifying nouns. In this instance, the relative clause.
The use the following sentence as an example:
(1) You can choose a color that you like
and also say it is also grammatical without the that, as in
(2) You can choose a color you like
My question: If you only see the text in (2), is there a way to identify that a relative pronoun is missing?
For instance, nouns are easily identified due to determiners, which are a small structure class.