Phoebe doesn’t seem to know that “unique” is a absolute adjective, i.e., it can’t be modified. Degree is a grammatical property of most adjectives. Normally, there are two degrees of comparison: comparative adjectives and superlative adjectives. There are some adjectives, however, such as “dead,” that do not lend themselves to degrees. Known as absolute adjectives, these cannot be formed into comparatives or superlatives, and they also cannot be modified by intensifying adverbs such as very, extremely, pretty, or rather.
Phoebe doesn’t seem to know that “unique” is a absolute adjective, i.e., it can’t be modified. Degree is a grammatical property of most adjectives. Normally, there are two degrees of comparison: comparative adjectives and superlative adjectives. There are some adjectives, however, such as “dead,” that do not lend themselves to degrees. Known as absolute adjectives, these cannot be formed into comparatives or superlatives, and they also cannot be modified by intensifying adverbs such as very, extremely, pretty, or rather.