预测标签概率和不等于1？

[Energy9502]

训练数据集为正面、负面数据。但是预测数据的结果：正面的得分（概率）与负面，得分（概率）之和不等于1？请问是什么原因。难道每个标签的得分是（0，1）区间吗？
正面,[[__label__pos,0.49219814],[__label__neg,0.11921292]],RT @abc: Fireworks greet Joe Biden and Kamala Harris following Biden's acceptance of the Democratic nomination for president. … Fireworks greet Joe Biden and Kamala Harris following Biden's acceptance of the Democratic nomination for president. #DemConvention
负面,[[__label__neg,0.28777784],[__label__pos,0.09808932]],RT @American_Bridge: The people who know Donald Trump best are sounding the alarm: our country cannot survive four more years of a Trump pr… The people who know Donald Trump best are sounding the alarm: our country cannot survive four more years of a Trump presidency.In our latest ad， a former member of his inner circle & fixer — @MichaelCohen212 — has a dire warning for us all. #RNC2020

[jimichan]

是的，按照我的理解，每个数据都计算和tag在向量空间的cos夹角，所以各自分布在[0,1]之间