The state or quality of being perplexed; puzzled or confused.
Something that perplexes.
In information theory, a measurement of how well a probability distribution or model predicts a sample.
Someone who is easily swayed or influenced to change his/her mind or comply.
Something that is easy to do or accomplish; an easy task.
Someone who lets him/herself be picked or bullied on without defending or standing up for him/herself.