Úloha ID 1610 - 
Adam, Bořek a Cecil se hádají o to, kdo má pravdu. My ovšem nevíme, kdo z nich má pravdu a kdo lže. Uvažujme i možnost, že pravdu mají všichni nebo že všichni lžou.
Které z následujících možností je pak určitě pravdivá?
Správná odpověď je: C
O Cecilovi určitě víme, že mluví pravdu. Kdyby lhal, tak by dle negace svého tvrzení totiž musel mít i zároveň pravdu. Bořek tak musí lhát, protože jeho tvrzení, že Cecil lže, není pravdivé. Z již získaných informací lze odvodit, že Adam nemůže lhát. Kdyby lhal, muselo by platit, že Bořek i Cecil mluví pravdu. Víme však, že Bořek lže.
| Výroky | Negace | ||
| Adam | B(L) ∨ C(L) | B(P) ∧ C(P) | |
| Bořek | A(L) ∧ C(L) | A(P) ∨ C(P) | |
| Cecil | Alespoň někdo lže. | A(P) ∧ B(P) ∧ C(P) | |
| Cookie | Délka | Popis |
|---|---|---|
| JSESSIONID | session | New Relic uses this cookie to store a session identifier so that New Relic can monitor session counts for an application. |
| Cookie | Délka | Popis |
|---|---|---|
| lp_session_guest | 2 days | Slouží k identifikaci a přihlášení uživatele ve studijním plánu. |
| TawkConnectionTime | session | Tawk.to, a live chat functionality, sets this cookie. For improved service, this cookie helps remember users so that previous chats can be linked together. |
| twk_idm_key | session | Tawk set this cookie to allow the website to recognise the visitor in order to optimize the chat-box functionality. |
| yt-player-headers-readable | never | The yt-player-headers-readable cookie is used by YouTube to store user preferences related to video playback and interface, enhancing the user's viewing experience. |
| yt-remote-cast-available | session | The yt-remote-cast-available cookie is used to store the user's preferences regarding whether casting is available on their YouTube video player. |
| yt-remote-cast-installed | session | The yt-remote-cast-installed cookie is used to store the user's video player preferences using embedded YouTube video. |
| yt-remote-connected-devices | never | YouTube sets this cookie to store the user's video preferences using embedded YouTube videos. |
| yt-remote-device-id | never | YouTube sets this cookie to store the user's video preferences using embedded YouTube videos. |
| yt-remote-fast-check-period | session | The yt-remote-fast-check-period cookie is used by YouTube to store the user's video player preferences for embedded YouTube videos. |
| yt-remote-session-app | session | The yt-remote-session-app cookie is used by YouTube to store user preferences and information about the interface of the embedded YouTube video player. |
| yt-remote-session-name | session | The yt-remote-session-name cookie is used by YouTube to store the user's video player preferences using embedded YouTube video. |
| ytidb::LAST_RESULT_ENTRY_KEY | never | The cookie ytidb::LAST_RESULT_ENTRY_KEY is used by YouTube to store the last search result entry that was clicked by the user. This information is used to improve the user experience by providing more relevant search results in the future. |
| Cookie | Délka | Popis |
|---|---|---|
| _gat | 1 minute | Google Universal Analytics sets this cookie to restrain request rate and thus limit data collection on high-traffic sites. |
| Cookie | Délka | Popis |
|---|---|---|
| _fbp | 3 months | Facebook sets this cookie to display advertisements when either on Facebook or on a digital platform powered by Facebook advertising after visiting the website. |
| _ga | 1 year 1 month 4 days | Google Analytics sets this cookie to calculate visitor, session and campaign data and track site usage for the site's analytics report. The cookie stores information anonymously and assigns a randomly generated number to recognise unique visitors. |
| _ga_* | 1 year 1 month 4 days | Google Analytics sets this cookie to store and count page views. |
| _gat_gtag_UA_* | 1 minute | Google Analytics sets this cookie to store a unique user ID. |
| _gid | 1 day | Google Analytics sets this cookie to store information on how visitors use a website while also creating an analytics report of the website's performance. Some of the collected data includes the number of visitors, their source, and the pages they visit anonymously. |
| last_pys_landing_page | 7 days | PixelYourSite plugin sets this cookie to manages the analytical services. |
| last_pysTrafficSource | 7 days | PixelYourSite plugin sets this cookie to manage the analytical services. |
| pys_first_visit | 7 days | PixelYourSite plugin sets this cookie to manage the analytical services. |
| pys_landing_page | 7 days | PixelYourSite plugin sets this cookie to manages the analytical services. |
| pys_session_limit | 1 hour | PixelYourSite plugin sets this cookie to manage the analytical services. |
| pys_start_session | session | PixelYourSite plugin sets this cookie to manage the analytical services. |
| pysTrafficSource | 7 days | PixelYourSite plugin sets this cookie to manage the analytical services. |
| sbjs_current | session | Sourcebuster sets this cookie to identify the source of a visit and stores user action information in cookies. This analytical and behavioural cookie is used to enhance the visitor experience on the website. |
| sbjs_current_add | session | Sourcebuster sets this cookie to identify the source of a visit and stores user action information in cookies. This analytical and behavioural cookie is used to enhance the visitor experience on the website. |
| sbjs_first | session | Sourcebuster sets this cookie to identify the source of a visit and stores user action information in cookies. This analytical and behavioural cookie is used to enhance the visitor experience on the website. |
| sbjs_first_add | session | Sourcebuster sets this cookie to identify the source of a visit and stores user action information in cookies. This analytical and behavioural cookie is used to enhance the visitor experience on the website. |
| sbjs_migrations | session | Sourcebuster sets this cookie to identify the source of a visit and stores user action information in cookies. This analytical and behavioural cookie is used to enhance the visitor experience on the website. |
| sbjs_session | 1 hour | Sourcebuster sets this cookie to identify the source of a visit and stores user action information in cookies. This analytical and behavioural cookie is used to enhance the visitor experience on the website. |
| sbjs_udata | session | Sourcebuster sets this cookie to identify the source of a visit and stores user action information in cookies. This analytical and behavioural cookie is used to enhance the visitor experience on the website. |
| vuid | 1 year 1 month 4 days | Vimeo installs this cookie to collect tracking information by setting a unique ID to embed videos on the website. |
| Cookie | Délka | Popis |
|---|---|---|
| _cfuvid | session | Description is currently not available. |
| pbid | 6 months | Description is currently not available. |
| SL_C_23361dd035530_DOMAIN | session | Description is currently not available. |
| uloha_switch | 1 day | Description is currently not available. |
Napsat komentář
Pro přidávání komentářů se musíte nejdříve přihlásit.