What body part would represent someone who is stubborn with their ideal but is flexible with small details?

(Not the brain or heart)

To find a body part that represents someone who is stubborn with their ideal but flexible with small details, we can look for attributes or metaphors that align with these characteristics. One possible body part that fits this description is the "backbone."

The backbone is responsible for providing support and structure to the body, much like how being stubborn with one's ideals can provide a strong foundation and firm belief system. However, the flexibility of the backbone allows for bending and adapting to different situations, just as being flexible with small details demonstrates an ability to adjust and compromise.

Therefore, the body part that represents someone who is stubborn with their ideal but flexible with small details is the "backbone."