她的怀疑是基于没有任何证据的臆测。

Her suspicion was based on unfounded ___presumptions.

他未经允许就使用我的电脑，这种傲慢的行为让人无法接受。

His ___presumption of using my computer without permission was unacceptable.

法庭基于无罪推定原则开展审理。

The court proceeds on the ___presumption of innocence.