Context:
And yes, I think it's something that people need to consider. This isn't something new. I read a report, or a memo, from somebody in his 1988 campaign -- I forgot the fellow's name -- warning then Senator Gore to be careful about exaggerating claims. I thought during his debate with Senator Bradley saying he authored the EITC when it didn't happen.
Hypothesis: EITC stands for earned income tax credit.
It's impossible to say
Context:
Herceptin was already approved to treat the sickest breast cancer patients, and the company said, Monday, it will discuss with federal regulators the possibility of prescribing the drug for more breast cancer patients.
Hypothesis: Herceptin has only five letters.
No
Context:
Tired<br>I was working very late. I wanted to go home. I had to finish my work though. I was extremely tired. I drank a cup of coffee to help me stay awake.
Hypothesis: I have to finish my work even though I want to go home and am extremely tired.

Yes