Question 180428
For a disjunction (or) to be true, EITHER or BOTH facts must be true
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the only time it is false is when both statements are false.
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for instance:
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1.   "Blue is a color or 7 + 3 = 10."
(T or T = T)  Since both facts are true, the entire sentence is true.   
 
 
2.   "One hour = exactly 55 minutes or one minute = exactly 60 seconds."
(F or T = T)  Since the second fact is true, the entire sentence is true. 
 
 
3.   "3 + 4 = 6 or all dogs meow."
(F or F = F) Since both facts are false, the entire sentence is false. 
 
 
4.  "The word cat has 3 letters or the word dog has four letters." 
(T  or F = T)  Since the first fact is true, the entire sentence is true.

God Bless!!!
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I hope this helps
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Mathtut