No, it's not rational at all.
I'm afraid it is
The problem is (of course) that the premises are not truthful.
The conclusion may be rationally based on the propositions (i.e. given X and given Y then conclusion Z), but this does not mean the statement as a whole is rational, especially when your statement asserts its propositions as facts that are demonstrably not truthful.
you can have rational statements that are not truthful (as given) and also truthful statements that are not rational.
eg - Today is Friday, I am wearing brown shoes, therefore I am hungry.
One can not demonstrate delusion and at the same time claim rationality - that is a paradox.
As indicated, rationality and truthfulness are two separate issues.
Generally a claim is credible if it fulfills both criteria.
One needs no qualifications to observe something. One merely has to look at it.
If a window cleaner was placed in front of this what do you think they could observe with it.
Compare to a lab technician.
If something can not be observed by the senses then, by default, it is akin to non-existence, as its existence can not be proven.
correction
it simply cannot meet the demands of empiricism
You are making the claim that one must be qualified to observe.
One may need to be qualified to understand what one is observing... but not to make the observation itself.
Ok then
When was the last time the minister of defense directly observed the prime minister?
When was the last time you did?
Why is it that you can not rock up and see the prime minister as often as the minister of defense?
What is essentially faulty about your skills of observation?
When man first saw an elephant, did his lack of qualification in elephants invalidate his observation?
a lack of naval craft to africa (as far as central australia circa 1500 AD is concerned) certainly invalidated the claim
No. He may not have understood what the elephant was (a giant? a god?) but he still saw it.
first of all they had to meet criteria to see it
Its not like they came to the conclusion by sitting on their laurels
Please show us this God of yours, and then we might go and get qualified to see if it really is what you say it is.
whenever you're ready to get off your laurels
A doctor might be able to fix your ailments - but presumably you go to him because you have observed those ailments?
not necessarily
A mechanic might be able to fix your car - but presumably the observation of it not working led you to search for the mechanic?
not necessarily
regular check ups or detecting one thing while seeking guidance for another is quite common.
For instance my father picked up a cancer in the bone of his leg while going in to see to back trouble (the two issues were not connected).
Similarly I went in to get the brakes relined the other day only to have it brought to my attention that the seal was broken on the rear axle