* Subject-Verb Agreement: "They" is a plural pronoun, but "tasted" is a singular verb. You need a plural verb like "tasted" to match the plural subject "they."
* Meaning: The sentence lacks a clear subject for the verb "tasted." What "tasted great" is not clear.
Here's how you could rewrite the sentence to make it grammatically correct and make sense:
* "The [food/drink] tasted great, whether it was hot or cold." Here, "the [food/drink]" is the subject, and "tasted" is the verb.
* "They [people] said the [food/drink] tasted great, regardless of whether it was hot or cold." Here, "they" is the subject, and "said" is the verb.
Remember, pronouns must agree with their antecedents (the words they replace) in number (singular/plural) and gender (masculine/feminine).