Found the main title and the content abit diff
First thing, base on the thing u point out:

1. Humans have 5 senses - sight, sound, taste, touch, smell. 6 if you like to include mind.
Scientifically, 5 sense is 5 sense, never be a 6 no matter how much u like it

2. Our senses are unreliable. We hear things that aren't there and we can't remember where we put our keys.
What to do with sense? Remembering only require memory. While hearing something couldn't be explain using one issue but base on many possibilities in diff situationd. (Example, hearing random voices after minor brain injury)

3. Our 6 senses are insufficent to 'see' reality so we build equipment like x-ray telescopes to see things outside our natural capabilities.
Those are technologies that is incaparable with our capability.
I would say both come with good or bad. For instance, technologies require medium and resource to make it work, thus it is limited especially when lack of resource; we human need resource too but our resource is more natural and last much longer, plus more reliable, at least it will not come out an unexpected error.

4. We are inventing new methods & equipment all the time, to 'see' more and more things we never knew existed before.
Same answer as above

5. There is no way to tell how many more attractions we haven't seen in the universe because we haven't invented the technology to see everything yet.
That last point also means tha quite possibly, our current & limited view of 'reality' is nothing like true reality. We only think we've seen everything and we brush aside anything that we doesn't match with our present knowledge.
This up to individual own perception of thing's value.
Since u able to point out this, it is clear that many people in this world think that there are too many things in this world has not been revealed or found out. U could say that is also the incapability of human sense but theres nothing wrong or improper with it

For the rest, i dont have much comment
While in reality, personal knowledge are divided into 3 types: truth, believes, and assumptions.
Assumptions are based on not so reliable points or knowledge an individual has to create certain statement that is not suitable to use to do much thing, in which not a main thing i wan to talk about.
There are many things in this world can fall into the category of believes, such as god, ghost, alien, *many things u can see in PhD section*, in which we can say there are points to believe that it is true however, since theres no absolute evidence to say that it is the true fact and there are ways to say that it is false (example, denying existence of ghost), so we can say such a thing is a thing to believe.
Many things fall into the category of truth as well but usually theres not much to debate about it,
because what truth is truth, it is meant to accept and not deny anything about it.
For example, an apple is red color, we can say that it is the truth, same goes to the sky is blue when it is daytime,
if u say those are not truth, then u need tons of reasons to debate about it
Of course, u can say something like the thing that cover up the apple is actually something else or theres an invisible layer before we actually see the sky's colors, but usually those point that u trying to use to debate in a true fact are call believes.

Sorry if this make u feel very complicated but basically using this three points is enough to let us know what to accept as true information and whats not