whats the opposite than a is faster than b its either b is faster than a or as fast

saying some small animals are faster would not make the sentence not true. to negate the sentence you are making it not true. if the sentence becomes only partially true well it still can be true but saying that large animals are faster or as fast as small animals negates (makes not true) that small animals are faster than large ones

its better to think of it as a minority rather than few but minority is not a perfect way to describe it as minority excludes exactly half