The difference between Positive and Uncertain

Positive as an adjective:

Not negative or neutral.

Positive as an adjective (legal):

Formally laid down.

Positive as an adjective:

Stated definitively and without qualification.

Positive as an adjective:

Fully assured in opinion.

Positive as an adjective (mathematics):

Of number, greater than zero.

Positive as an adjective:

Characterized by constructiveness or influence for the better.

Positive as an adjective:

Overconfident, dogmatic.

Positive as an adjective (chiefly, philosophy):

Actual, real, concrete, not theoretical or speculative.

Positive as an adjective (physics):

Having more protons than electrons.

Positive as an adjective (grammar):

Describing the primary sense of an adjective, adverb or noun; not comparative, superlative, augmentative nor diminutive.

Positive as an adjective:

Derived from an object by itself; not dependent on changing circumstances or relations; absolute.

Positive as an adjective:

Characterized by the existence or presence of distinguishing qualities or features, rather than by their absence.

Positive as an adjective:

Characterized by the presence of features which support a hypothesis.

Positive as an adjective (photography):

Of a visual image, true to the original in light, shade and colour values.

Positive as an adjective:

Favorable, desirable by those interested or invested in that which is being judged.

Positive as an adjective:

Wholly what is expressed; colloquially downright, entire, outright.

Positive as an adjective:

Optimistic.

Positive as an adjective (chemistry):

electropositive

Positive as an adjective (chemistry):

basic; metallic; not acid; opposed to negative, and said of metals, bases, and basic radicals.

Positive as an adjective (slang):

HIV positive.

Positive as an adjective ([[New Age]] [[jargon]]):

Good, desirable, healthful, pleasant, enjoyable; (often precedes 'energy', 'thought', 'feeling' or 'emotion').

Positive as a noun:

A thing capable of being affirmed; something real or actual.

Positive as a noun:

A favourable point or characteristic.

Positive as a noun:

Something having a positive value in physics, such as an electric charge.

Positive as a noun (grammar):

A degree of comparison of adjectives and adverbs.

Positive as a noun (grammar):

An adjective or adverb in the positive degree.

Positive as a noun (photography):

A positive image; one that displays true colors and shades, as opposed to a negative.

Positive as a noun:

The positive plate of a voltaic or electrolytic cell.

Positive as a noun:

A positive result of a test.

Uncertain as an adjective:

Not certain; unsure.

Uncertain as an adjective:

Not known for certain; questionable.

Uncertain as an adjective:

Not yet determined; undecided.

Uncertain as an adjective:

Variable and subject to change.

Uncertain as an adjective:

Fitful or unsteady.

Uncertain as an adjective:

Unpredictable or capricious.

Uncertain as a noun (with "the"):

Something uncertain.