Distance for Brief type features

[ \mathbf{word} \ominus \mathbf{feature} = \mathbf{distance}]

[ 00 \ominus 0 = 00]

[ 01 \ominus 0 = 01]

[ 10 \ominus 0 = 10]

[ 11 \ominus 0 = 11]

[ 00 \ominus 1 = 11]

[ 01 \ominus 1 = 10]

[ 10 \ominus 1 = 01]

[ 11 \ominus 1 = 00]