can result

Yes. We may use 'can' to express possibility, ability or potential - a bear can kill a man, walking near a cliff can result in a fall, a hot thing can burn you, etc.

Thank you, Con.

If so, can we now say IT CAN'T BE BETTER etc. even when CAN means POSSIBLE?

Sure, English speakers say that all the time. They mean that it is not possible for the situation to be better.

'Can' doesn't just signify possibility; it also signifies ability, as I said before.

We may use 'can' if we mean "It is not possible for it to be better". Of course this could be ambiguous. It could mean (for example):

It cannot be better because it is perfect (It is definitely very good)

It cannot be better because it is as good as it can be in the present circumstances (It could be bad, good, or very good)

It cannot be better because it there is inherently no possibility of improvement. (Likewise)

Thank you~

What does 'all the time' mean? Often or always?

It can mean either; in this case it means "very often" or "commonly".

Thank you~~

If CAN can means possible, then why can't we say this?:

-More than half of the population CAN win a prize

when a fast food shop is holding/going to hold a lottery.

'Can' doesn't just signify possibility; it also signifies ability, as I am now saying for the third time.

More than half of the population CAN read
More than half of the population CAN write
More than half of the population CAN ride a bicycle
More than half of the population CAN speak French

To signify future possibility or potentiality we use 'could'.

More than half of the population CAN buy a lottery ticket and COULD win a prize.

Many bridges have cracks and could collapse.

We use 'can' to signify possibility in a generic sense:

A (generic, hypothetical) building constructed of inferior materials can collapse in an earthquake. That (actual, physical) building over there is constructed of inferior materials and could collapse in an earthquake.

When I went to school, "can" was listed as a helping verb - along with may, might, and will.

Very good answer. Thank you~

Then why can we say CAN?:

-If it's raining towmorrow, the sports CAN take place indoors.

In dictionaries I can't find this; but is it correct?:

-I can't agree more.

Are they both correct?:

-Genetic defects can/could become apparent in the next generation.

Yes.