From what i have read up on in the past, They can but they don't really think with a "voice" in their head if that makes sense.
This is not a biology question this is a math question
Answer:
The meaningful differences between organisms in a population are genetic. Variations in the genome of members of a population arise through mutation. Occasionally, a mutation occurs in an individual that is beneficial, that helps that organism be better able to survive and repoduce in its current environment.
