I'm a firm believer that the difference between being delusional and skeptical, falls in the category of having a closed mind.

Delusional:

When your mind is closed, it doesn't matter if your wearing tin foil or not because everything that contradicts reality lives right between your two eyes. It's your brains way of taking information and spinning it to fit your own agenda.

Skeptical

:Skepticism or scepticism (see spelling differences) is generally any questioning attitude towards unempirical knowledge or opinions/beliefs stated as facts,[1] or doubt regarding claims that are taken for granted elsewhere.[2] Skepticism is often separated into categories, related to morality (right or wrong), religion (religious doubt), or the nature of knowledge ("there is no knowledge beyond how things appear.")[3]

Now we're getting somewhere