It isn't so much about still being in second place and being unrealistic, I think what
@Khalekan was trying to express, and which I tend to agree, is the rather disturbing way that our results and form have dropped off after an encouraging start.
If you really wanted to be brutal about it... we played a good 60-65 minutes against Spurs before running out of gas; RK made highly influential changes (quickly) against both West Brom and Sunderland that secured valuable wins; we were lucky with an in-off-the-keepers-head penalty against a woeful Stoke and we bludgeoned a Boro team that had little self-belief at that time.
To counter that, we naused up against Norwich, Bournemouth and Burnley, and rode our luck certainly at City and to some extent against Palace.
We need to get back to winning ways BIGTIME against West Ham on Sunday to arrest a slightly concerning slide in results, and indeed performance.