Life is full of surprises.
Again:
Some nouns are abstract - surprise, thought, information.
Some nouns are not abstract but physical/tangible - chair, cheese, bread, window.
There are countable nouns - thought, chair, window, surprise, etc.
There are uncountable nouns - cheese, information, bread, etc.
Of those, there nouns that are both countable and abstract - thought, surprise.
There are nouns that are uncountable and abstract - information
Some are countable and non-abstract - chair, window
Others are uncountable and non-abstract - cheese, bread
Conclusion: countable and abstract is
not the same thing. Whoever told you they are made a big mistake.
On top of that, there are nouns that are abstract but can be
both countable and uncountable, but I think you should not go there yet.
