Tautology and contradiction A compound statement that is always true, regardless of what truth values are assigned to its statement variables, is called a tautology or a logic law . Such a statement is logically true . A compound statement that is always false, regardless of what truth values are a...
The truth function Let S be a compound statement. We can define a function f S , called the truth function of S , in the following way 1 If S contains the n distinct statement variables p 1 , p 2 , ..., p n , and no others, then the truth function f S is a function of n variables x 1 , x 2 , ..., x...
Truth table We can use the above rules to find the truth tables of more complex compound statements. Let's consider ( p ∧ ∼ q ) ⇐⇒ ( ∼ p = ⇒ q ) ( ⋆ ) p q ∼ p ∼ q p ∧ ∼ q ∼ p = ⇒ q ( ⋆ ) 1 1 0 0 0 1 0 1 0 0 1 1 1 1 0 1 1 0 0 1 0 0 0 1 1 0 0 1 p, q - statement variables The number of rows in the tru...
Account Type Privileges Each account.s type is displayed beneath the account name on the Welcome screen. The three account types and their associated privileges are. A Limited user account (a member of the User s group) can: Change the picture associated with that user.s account. Change t...
Activating Windows XP Professional Product Activation is an anti-piracy measure that will be included in all future Microsoft software applications. Anti-piracy measures protect organizations from having their software stolen. Windows XP Professional and Microsoft Office XP are the first applica...
Answer File Syntax The settings in an answer file take the following format: [ section ] key = value where [ section ] describes the category of parameters that follow. key defines the name of the parameter. value contains the actual configuration settings. For example, you could configu...
Authenticating Local User Accounts When users log on to a local computer, the authentication process proceeds as follows: 1. The user provides a user name and a password, and Windows XP Professional forwards this information to the SAM of that local computer. 2. Windows XP Professional compares...
Automating an Installation of Windows XP Professional In many organizations, staffing levels, distance, and time constraints make it impossible to manually deploy new operating systems on one computer at a time. An alternative to this labor- and time-intensive
Basic Disks vs Dynamic Disks A basic disk is the default disk type for Windows Server 2003. A basic disk provides you with limited capabilities for setting up your disks. Dynamic disks provide you with more flexibility for setting up your hard disk than basic disks provide. For example, you can ...
Best Practices for Preparing Disks When you prepare a disk for partitioning, it is recommended that you back up your data and format your volumes with the NTFS file system. Because deleting or creating partitions or volumes destroys any existing data, be sure to back up the disk contents beforeh...
