What is entailment? Entailment is a concept that refers to a specific kind of relationship between two sentences. More specifically, entailment means that if one sentence is true, then another sentence would also have to be true: the second sentence would be entailed by the first sentence. Another way to prove entailment between two sentences is to demonstrate that if the one sentence is false, then the other sentence must also be false. Entailment is closely related to the concept of logical consequence. Within logic, the idea that if A is true, then B must be true too is nothing other than a form of entailment. Usage and rules
The topic is being increasingly debated as children get smartphones at an ever younger age. On average, children are getting their first smartphones around age 10, according to the research firm Influence Central, down from age 12 in 2012. For some children, smartphone ownership starts even sooner â including second graders as young as 7, according to internet safety experts.
My own 12-year-old is a texting rock star, clocking in 2,500 per month compared to my 600 average. But beyond how cellphone-crazy teens and tweens have become, thereâs one side of the story that has been missing. Mobile phones may be inevitable, but when is the right time for parents to get a child their own mobile phone? Most experts agree thereâs no single answer thatâs right for every parent and every child. SEE ALSO: How Smartphones Keep Parents Organized. Harris Interactive recently polled parents on what they thought was the most appropriate age for a child to receive their first phone.