What does this phrase mean: 'I should have thought.'?

[Alfred]

Test No. incompl/inter-23 "Leave me alone", question 2

User: I should have tought is was pretty ..........

(a) obvious
(b) absolute
(c) noticeable
(d) accurate

Test No. incompl/inter-23 "Leave me alone", answer 2

User: I should have tought is was pretty obvious.

Correct answer: (a) obvious
_________________________

What does it mean?
I should have tought.
Alfred

[Alan]

This should be THOUGHT - I'll get that changed. Thank you.
_________________
English as a Second Language
You can read my ESL story Word Story: Jokes

[juldancer17]

What do you mean?

[Guest]

[Alan]

[Casafon]

Maybe the solution is that an user pronounce that sentence and they are supposed to do some mistakes....

[Yankee]

.
No, that sentence simply had two typos in it originally, but only one of the typos has been repaired.

How about it, Alan and Torsten? Can we get the word 'is' changed to 'it' in that sentence?
.

[Casafon]

it was only a joke! I didn´t want to reignite the debate about it. Bye to everyone
Paolo