Public Option?

Okay, now I am confused.

Yesterday, Pelosi was claiming that she had the votes to pass a public option.

House Democrats "definitely" have a health reform bill right now that could win 218 votes in the House, Speaker Nancy Pelosi (D-Calif.) said Wednesday.

Today...

Speaker Nancy Pelosi counted votes Thursday night and determined she could not pass a “robust public option” — the most aggressive of the three forms of a public option House Democrats have been considering as part of a national overhaul of health care.

Okay- so what is the truth?