The above compounds are used to demonstrate the application of the inclusive vs. non-inclusive steric number calculation method when trying to determine the most acidic compound given, which is done by comparing the stability of each acids' conjugate base. When comparing the stability of conjugate bases based on aromaticity, the non-inclusive approach is used without comparison to the compound's aromaticity according to the inclusive approach. Due to this restriction, an antiaromatic conjugate base (determined by the non-inclusive approach) is not able to adopt a more stable nonaromatic configuration specifically following deprotonation even if the inclusive approach makes one of the atoms in the compound sp -hybridized (which would make the compound lack the required conjugated pi system and lead to a nonaromatic configuration).